64391356 has 12 divisors (see below), whose sum is σ = 114532600. Its totient is φ = 31667760.

The previous prime is 64391321. The next prime is 64391387. The reversal of 64391356 is 65319346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131706 + ... + 132193.

Almost surely, 2^64391356 is an apocalyptic number.

It is an amenable number.

64391356 is a deficient number, since it is larger than the sum of its proper divisors (50141244).

64391356 is a wasteful number, since it uses less digits than its factorization.

64391356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263964 (or 263962 counting only the distinct ones).

The product of its digits is 58320, while the sum is 37.

The square root of 64391356 is about 8024.4224714306. The cubic root of 64391356 is about 400.8136687357.

The spelling of 64391356 in words is "sixty-four million, three hundred ninety-one thousand, three hundred fifty-six".