64681612 has 24 divisors (see below), whose sum is σ = 119300832. Its totient is φ = 30624000.

The previous prime is 64681597. The next prime is 64681619. The reversal of 64681612 is 21618646.

It is not an unprimeable number, because it can be changed into a prime (64681619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5812 + ... + 12772.

It is an arithmetic number, because the mean of its divisors is an integer number (4970868).

Almost surely, 2^64681612 is an apocalyptic number.

It is an amenable number.

64681612 is a deficient number, since it is larger than the sum of its proper divisors (54619220).

64681612 is a wasteful number, since it uses less digits than its factorization.

64681612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7089 (or 7087 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 64681612 is about 8042.4879235222. The cubic root of 64681612 is about 401.4150134399.

The spelling of 64681612 in words is "sixty-four million, six hundred eighty-one thousand, six hundred twelve".