642258752554 has 16 divisors (see below), whose sum is σ = 963997920000. Its totient is φ = 320926178160.

The previous prime is 642258752521. The next prime is 642258752567. The reversal of 642258752554 is 455257852246.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 642258752495 and 642258752504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25412284 + ... + 25437544.

It is an arithmetic number, because the mean of its divisors is an integer number (60249870000).

Almost surely, 2^642258752554 is an apocalyptic number.

642258752554 is a deficient number, since it is larger than the sum of its proper divisors (321739167446).

642258752554 is a wasteful number, since it uses less digits than its factorization.

642258752554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32805.

The product of its digits is 26880000, while the sum is 55.

The spelling of 642258752554 in words is "six hundred forty-two billion, two hundred fifty-eight million, seven hundred fifty-two thousand, five hundred fifty-four".