64401868 has 12 divisors (see below), whose sum is σ = 118635160. Its totient is φ = 30506112.

The previous prime is 64401853. The next prime is 64401877. The reversal of 64401868 is 86810446.

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, 423621 + ... + 423772.

Almost surely, 2^64401868 is an apocalyptic number.

It is an amenable number.

64401868 is a deficient number, since it is larger than the sum of its proper divisors (54233292).

64401868 is a wasteful number, since it uses less digits than its factorization.

64401868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847416 (or 847414 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 64401868 is about 8025.0774451092. The cubic root of 64401868 is about 400.8354787233.

The spelling of 64401868 in words is "sixty-four million, four hundred one thousand, eight hundred sixty-eight".