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642370155643741 = 7463884922398149
BaseRepresentation
bin1001001000001110110111010…
…0111100010000001101011101
310010020102222122121211000200111
42102003231310330100031131
51133144043034321044431
610154112435305530021
7252206466201021040
oct22203556474201535
93106388577730614
10642370155643741
1117675172033a658
12600677814a3911
1321758326c08685
14b48ac4a8a8c57
154e3e7c667d7b1
hex2483b74f1035d

642370155643741 has 16 divisors (see below), whose sum is σ = 735806105280000. Its totient is φ = 549351671033088.

The previous prime is 642370155643639. The next prime is 642370155643747. The reversal of 642370155643741 is 147346551073246.

It is a de Polignac number, because none of the positive numbers 2k-642370155643741 is a prime.

It is a super-2 number, since 2×6423701556437412 (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642370155643747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17480535 + ... + 39878683.

It is an arithmetic number, because the mean of its divisors is an integer number (45987881580000).

Almost surely, 2642370155643741 is an apocalyptic number.

It is an amenable number.

642370155643741 is a deficient number, since it is larger than the sum of its proper divisors (93435949636259).

642370155643741 is a wasteful number, since it uses less digits than its factorization.

642370155643741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22407468.

The product of its (nonzero) digits is 50803200, while the sum is 58.

The spelling of 642370155643741 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred fifty-five million, six hundred forty-three thousand, seven hundred forty-one".

Divisors: 1 7 463 3241 8849 61943 4097087 22398149 28679609 156787043 10370342987 72592400909 198201220501 1387408543507 91767165091963 642370155643741