64691404 has 12 divisors (see below), whose sum is σ = 113387904. Its totient is φ = 32294864.

The previous prime is 64691383. The next prime is 64691413. The reversal of 64691404 is 40419646.

It is a self number, because there is not a number n which added to its sum of digits gives 64691404.

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, 9772 + ... + 14995.

It is an arithmetic number, because the mean of its divisors is an integer number (9448992).

Almost surely, 2^64691404 is an apocalyptic number.

It is an amenable number.

64691404 is a deficient number, since it is larger than the sum of its proper divisors (48696500).

64691404 is a wasteful number, since it uses less digits than its factorization.

64691404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25424 (or 25422 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 64691404 is about 8043.0966673291. The cubic root of 64691404 is about 401.4352688486.

The spelling of 64691404 in words is "sixty-four million, six hundred ninety-one thousand, four hundred four".