64642902 has 32 divisors (see below), whose sum is σ = 137116800. Its totient is φ = 20259648.

The previous prime is 64642829. The next prime is 64642931. The reversal of 64642902 is 20924646.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13549 + ... + 17687.

It is an arithmetic number, because the mean of its divisors is an integer number (4284900).

Almost surely, 2^64642902 is an apocalyptic number.

64642902 is an abundant number, since it is smaller than the sum of its proper divisors (72473898).

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

64642902 is a wasteful number, since it uses less digits than its factorization.

64642902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 64642902 is about 8040.0809697415. The cubic root of 64642902 is about 401.3349191877.

The spelling of 64642902 in words is "sixty-four million, six hundred forty-two thousand, nine hundred two".