642727625078 has 64 divisors (see below), whose sum is σ = 1242756864000. Its totient is φ = 242009907840.

The previous prime is 642727625039. The next prime is 642727625083. The reversal of 642727625078 is 870526727246.

It is a super-2 number, since 2×642727625078² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 470483 + ... + 1227521.

It is an arithmetic number, because the mean of its divisors is an integer number (19418076000).

Almost surely, 2^642727625078 is an apocalyptic number.

642727625078 is a deficient number, since it is larger than the sum of its proper divisors (600029238922).

642727625078 is a wasteful number, since it uses less digits than its factorization.

642727625078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757245.

The product of its (nonzero) digits is 15805440, while the sum is 56.

The spelling of 642727625078 in words is "six hundred forty-two billion, seven hundred twenty-seven million, six hundred twenty-five thousand, seventy-eight".