642736901159 has 16 divisors (see below), whose sum is σ = 654690921696. Its totient is φ = 630856512000.

The previous prime is 642736901129. The next prime is 642736901231. The reversal of 642736901159 is 951109637246.

It is a cyclic number.

It is not a de Polignac number, because 642736901159 - 2²⁸ = 642468465703 is a prime.

It is a super-2 number, since 2×642736901159² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 642736901159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642736901129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20963789 + ... + 20994425.

It is an arithmetic number, because the mean of its divisors is an integer number (40918182606).

Almost surely, 2^642736901159 is an apocalyptic number.

642736901159 is a deficient number, since it is larger than the sum of its proper divisors (11954020537).

642736901159 is a wasteful number, since it uses less digits than its factorization.

642736901159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31826.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The spelling of 642736901159 in words is "six hundred forty-two billion, seven hundred thirty-six million, nine hundred one thousand, one hundred fifty-nine".