642370155642656 has 24 divisors (see below), whose sum is σ = 1445332850196480. Its totient is φ = 275301495275328.

The previous prime is 642370155642637. The next prime is 642370155642673. The reversal of 642370155642656 is 656246551073246.

642370155642656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1433861954336 + ... + 1433861954783.

It is an arithmetic number, because the mean of its divisors is an integer number (60222202091520).

Almost surely, 2^{642370155642656} is an apocalyptic number.

It is an amenable number.

642370155642656 is an abundant number, since it is smaller than the sum of its proper divisors (802962694553824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642370155642656 is a wasteful number, since it uses less digits than its factorization.

642370155642656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867723909136 (or 2867723909128 counting only the distinct ones).

The product of its (nonzero) digits is 217728000, while the sum is 62.

The spelling of 642370155642656 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred fifty-five million, six hundred forty-two thousand, six hundred fifty-six".