642825076 has 18 divisors (see below), whose sum is σ = 1143714390. Its totient is φ = 316136160.

The previous prime is 642825067. The next prime is 642825109. The reversal of 642825076 is 670528246.

642825076 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 161900176 + 480924900 = 12724^2 + 21930^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6711 + ... + 36478.

Almost surely, 2^642825076 is an apocalyptic number.

It is an amenable number.

642825076 is a deficient number, since it is larger than the sum of its proper divisors (500889314).

642825076 is a wasteful number, since it uses less digits than its factorization.

642825076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43315 (or 43252 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 642825076 is about 25353.9952670186. The cubic root of 642825076 is about 863.0400235297.

The spelling of 642825076 in words is "six hundred forty-two million, eight hundred twenty-five thousand, seventy-six".