642500696 has 8 divisors (see below), whose sum is σ = 1204688820. Its totient is φ = 321250344.

The previous prime is 642500681. The next prime is 642500707. The reversal of 642500696 is 696005246.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40156286 + ... + 40156301.

Almost surely, 2^642500696 is an apocalyptic number.

It is an amenable number.

642500696 is a deficient number, since it is larger than the sum of its proper divisors (562188124).

642500696 is a wasteful number, since it uses less digits than its factorization.

642500696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80312593 (or 80312589 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 642500696 is about 25347.5974403887. The cubic root of 642500696 is about 862.8948310888.

The spelling of 642500696 in words is "six hundred forty-two million, five hundred thousand, six hundred ninety-six".