642370145643255 has 16 divisors (see below), whose sum is σ = 1027792878787584. Its totient is φ = 342597195756960.

The previous prime is 642370145643253. The next prime is 642370145643263. The reversal of 642370145643255 is 552346541073246.

It is not a de Polignac number, because 642370145643255 - 2¹ = 642370145643253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642370145643195 and 642370145643204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642370145643253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12879202 + ... + 38086928.

It is an arithmetic number, because the mean of its divisors is an integer number (64237054924224).

Almost surely, 2^{642370145643255} is an apocalyptic number.

642370145643255 is a deficient number, since it is larger than the sum of its proper divisors (385422733144329).

642370145643255 is a wasteful number, since it uses less digits than its factorization.

642370145643255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26906606.

The product of its (nonzero) digits is 72576000, while the sum is 57.

The spelling of 642370145643255 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred forty-five million, six hundred forty-three thousand, two hundred fifty-five".