64415916 has 36 divisors (see below), whose sum is σ = 169910832. Its totient is φ = 20538144.

The previous prime is 64415867. The next prime is 64415917. The reversal of 64415916 is 61951446.

64415916 is a `hidden beast` number, since 64 + 4 + 1 + 591 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (64415917) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38071 + ... + 39726.

Almost surely, 2^64415916 is an apocalyptic number.

It is an amenable number.

64415916 is an abundant number, since it is smaller than the sum of its proper divisors (105494916).

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

64415916 is a wasteful number, since it uses less digits than its factorization.

64415916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77830 (or 77825 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 64415916 is about 8025.9526537353. The cubic root of 64415916 is about 400.8646213947.

The spelling of 64415916 in words is "sixty-four million, four hundred fifteen thousand, nine hundred sixteen".