64616868 has 18 divisors (see below), whose sum is σ = 163337174. Its totient is φ = 21538944.

The previous prime is 64616857. The next prime is 64616879. The reversal of 64616868 is 86861646.

It is an interprime number because it is at equal distance from previous prime (64616857) and next prime (64616879).

It can be written as a sum of positive squares in only one way, i.e., 63489024 + 1127844 = 7968^2 + 1062^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 897421 + ... + 897492.

Almost surely, 2^64616868 is an apocalyptic number.

It is an amenable number.

64616868 is an abundant number, since it is smaller than the sum of its proper divisors (98720306).

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

64616868 is a wasteful number, since it uses less digits than its factorization.

64616868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1794923 (or 1794918 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 64616868 is about 8038.4617931542. The cubic root of 64616868 is about 401.2810346625.

The spelling of 64616868 in words is "sixty-four million, six hundred sixteen thousand, eight hundred sixty-eight".