64912916 has 12 divisors (see below), whose sum is σ = 115741332. Its totient is φ = 31843968.

The previous prime is 64912907. The next prime is 64912927. The reversal of 64912916 is 61921946.

It can be written as a sum of positive squares in 2 ways, for example, as 26522500 + 38390416 = 5150^2 + 6196^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 64912916.

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, 152885 + ... + 153308.

It is an arithmetic number, because the mean of its divisors is an integer number (9645111).

Almost surely, 2^64912916 is an apocalyptic number.

It is an amenable number.

64912916 is a deficient number, since it is larger than the sum of its proper divisors (50828416).

64912916 is a wasteful number, since it uses less digits than its factorization.

64912916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306250 (or 306248 counting only the distinct ones).

The product of its digits is 23328, while the sum is 38.

The square root of 64912916 is about 8056.8552177633. The cubic root of 64912916 is about 401.8929361840.

The spelling of 64912916 in words is "sixty-four million, nine hundred twelve thousand, nine hundred sixteen".