642525136162 has 64 divisors (see below), whose sum is σ = 1243914094080. Its totient is φ = 242058668544.

The previous prime is 642525136129. The next prime is 642525136193. The reversal of 642525136162 is 261631525246.

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, 448518 + ... + 1219105.

It is an arithmetic number, because the mean of its divisors is an integer number (19436157720).

Almost surely, 2^642525136162 is an apocalyptic number.

642525136162 is a deficient number, since it is larger than the sum of its proper divisors (601388957918).

642525136162 is a wasteful number, since it uses less digits than its factorization.

642525136162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667747.

The product of its digits is 518400, while the sum is 43.

The spelling of 642525136162 in words is "six hundred forty-two billion, five hundred twenty-five million, one hundred thirty-six thousand, one hundred sixty-two".