64909356 has 24 divisors (see below), whose sum is σ = 151617984. Its totient is φ = 21613200.

The previous prime is 64909331. The next prime is 64909387. The reversal of 64909356 is 65390946.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11631 + ... + 16281.

It is an arithmetic number, because the mean of its divisors is an integer number (6317416).

Almost surely, 2^64909356 is an apocalyptic number.

It is an amenable number.

64909356 is an abundant number, since it is smaller than the sum of its proper divisors (86708628).

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

64909356 is a wasteful number, since it uses less digits than its factorization.

64909356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821 (or 5819 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 42.

The square root of 64909356 is about 8056.6342848611. The cubic root of 64909356 is about 401.8855890843.

The spelling of 64909356 in words is "sixty-four million, nine hundred nine thousand, three hundred fifty-six".