642524191168 has 28 divisors (see below), whose sum is σ = 1318974771240. Its totient is φ = 310184091392.

The previous prime is 642524191163. The next prime is 642524191189. The reversal of 642524191168 is 861191425246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642524191163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173091946 + ... + 173095657.

It is an arithmetic number, because the mean of its divisors is an integer number (47106241830).

Almost surely, 2^642524191168 is an apocalyptic number.

It is an amenable number.

642524191168 is an abundant number, since it is smaller than the sum of its proper divisors (676450580072).

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

642524191168 is a wasteful number, since it uses less digits than its factorization.

642524191168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346187644 (or 346187634 counting only the distinct ones).

The product of its digits is 829440, while the sum is 49.

The spelling of 642524191168 in words is "six hundred forty-two billion, five hundred twenty-four million, one hundred ninety-one thousand, one hundred sixty-eight".