642370135643777 has 8 divisors (see below), whose sum is σ = 680157584706600. Its totient is φ = 604582794413824.

The previous prime is 642370135643749. The next prime is 642370135643783. The reversal of 642370135643777 is 777346531073246.

It can be written as a sum of positive squares in 4 ways, for example, as 356974015787536 + 285396119856241 = 18893756^2 + 16893671^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642370135643777 - 2¹⁸ = 642370135381633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642370135643077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14529902 + ... + 38676327.

It is an arithmetic number, because the mean of its divisors is an integer number (85019698088325).

Almost surely, 2^{642370135643777} is an apocalyptic number.

It is an amenable number.

642370135643777 is a deficient number, since it is larger than the sum of its proper divisors (37787449062823).

642370135643777 is a wasteful number, since it uses less digits than its factorization.

642370135643777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53916435.

The product of its (nonzero) digits is 373403520, while the sum is 65.

The spelling of 642370135643777 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred thirty-five million, six hundred forty-three thousand, seven hundred seventy-seven".