64691854 has 16 divisors (see below), whose sum is σ = 100638720. Its totient is φ = 31155480.

The previous prime is 64691843. The next prime is 64691897. The reversal of 64691854 is 45819646.

It is a self number, because there is not a number n which added to its sum of digits gives 64691854.

It is a congruent number.

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, 11487 + ... + 16165.

It is an arithmetic number, because the mean of its divisors is an integer number (6289920).

Almost surely, 2^64691854 is an apocalyptic number.

64691854 is a deficient number, since it is larger than the sum of its proper divisors (35946866).

64691854 is a wasteful number, since it uses less digits than its factorization.

64691854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935.

The product of its digits is 207360, while the sum is 43.

The square root of 64691854 is about 8043.1246415805. The cubic root of 64691854 is about 401.4361996547.

The spelling of 64691854 in words is "sixty-four million, six hundred ninety-one thousand, eight hundred fifty-four".