642370155643675 has 12 divisors (see below), whose sum is σ = 797995188614776. Its totient is φ = 512956643472000.

The previous prime is 642370155643639. The next prime is 642370155643747. The reversal of 642370155643675 is 576346551073246.

It is a de Polignac number, because none of the positive numbers 2^k-642370155643675 is a prime.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23487012126 + ... + 23487039475.

Almost surely, 2^{642370155643675} is an apocalyptic number.

642370155643675 is a deficient number, since it is larger than the sum of its proper divisors (155625032971101).

642370155643675 is a wasteful number, since it uses less digits than its factorization.

642370155643675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46974052158 (or 46974052153 counting only the distinct ones).

The product of its (nonzero) digits is 381024000, while the sum is 64.

The spelling of 642370155643675 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred fifty-five million, six hundred forty-three thousand, six hundred seventy-five".