642611125524 has 24 divisors (see below), whose sum is σ = 1499654123968. Its totient is φ = 214171113600.

The previous prime is 642611125489. The next prime is 642611125547. The reversal of 642611125524 is 425521116246.

It is a congruent number.

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, 3992152 + ... + 4149999.

Almost surely, 2^642611125524 is an apocalyptic number.

It is an amenable number.

642611125524 is an abundant number, since it is smaller than the sum of its proper divisors (857042998444).

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

642611125524 is a wasteful number, since it uses less digits than its factorization.

642611125524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8148735 (or 8148733 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The spelling of 642611125524 in words is "six hundred forty-two billion, six hundred eleven million, one hundred twenty-five thousand, five hundred twenty-four".