642275604 has 72 divisors (see below), whose sum is σ = 1643281640. Its totient is φ = 211507200.

The previous prime is 642275597. The next prime is 642275653. The reversal of 642275604 is 406572246.

642275604 is a `hidden beast` number, since 6 + 42 + 2 + 7 + 5 + 604 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 110880900 + 531394704 = 10530^2 + 23052^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1570152 + ... + 1570560.

Almost surely, 2^642275604 is an apocalyptic number.

It is an amenable number.

642275604 is an abundant number, since it is smaller than the sum of its proper divisors (1001006036).

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

642275604 is a wasteful number, since it uses less digits than its factorization.

642275604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841 (or 836 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 642275604 is about 25343.1569462054. The cubic root of 642275604 is about 862.7940512188.

The spelling of 642275604 in words is "six hundred forty-two million, two hundred seventy-five thousand, six hundred four".