642370155643677 has 32 divisors (see below), whose sum is σ = 916051232194560. Its totient is φ = 399409236420480.

The previous prime is 642370155643639. The next prime is 642370155643747. The reversal of 642370155643677 is 776346551073246.

It is not a de Polignac number, because 642370155643677 - 2³⁴ = 642352975774493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642370155643277) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 59567893 + ... + 69520314.

It is an arithmetic number, because the mean of its divisors is an integer number (28626601006080).

Almost surely, 2^{642370155643677} is an apocalyptic number.

It is an amenable number.

642370155643677 is a deficient number, since it is larger than the sum of its proper divisors (273681076550883).

642370155643677 is a wasteful number, since it uses less digits than its factorization.

642370155643677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129090033.

The product of its (nonzero) digits is 533433600, while the sum is 66.

The spelling of 642370155643677 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-seven".