642362515155 has 16 divisors (see below), whose sum is σ = 1141977804960. Its totient is φ = 342593341344.

The previous prime is 642362515139. The next prime is 642362515177. The reversal of 642362515155 is 551515263246.

642362515155 is a `hidden beast` number, since 6 + 4 + 2 + 3 + 625 + 1 + 5 + 15 + 5 = 666.

It is not a de Polignac number, because 642362515155 - 2⁴ = 642362515139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 642362515155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2379120292 + ... + 2379120561.

It is an arithmetic number, because the mean of its divisors is an integer number (71373612810).

Almost surely, 2^642362515155 is an apocalyptic number.

642362515155 is a deficient number, since it is larger than the sum of its proper divisors (499615289805).

642362515155 is a wasteful number, since it uses less digits than its factorization.

642362515155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4758240867 (or 4758240861 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 45.

The spelling of 642362515155 in words is "six hundred forty-two billion, three hundred sixty-two million, five hundred fifteen thousand, one hundred fifty-five".