64769994 has 24 divisors (see below), whose sum is σ = 140825412. Its totient is φ = 21514560.

The previous prime is 64769959. The next prime is 64770019. The reversal of 64769994 is 49996746.

It can be written as a sum of positive squares in 2 ways, for example, as 50594769 + 14175225 = 7113^2 + 3765^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64769994.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 867 + ... + 11414.

Almost surely, 2^64769994 is an apocalyptic number.

64769994 is an abundant number, since it is smaller than the sum of its proper divisors (76055418).

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

64769994 is a wasteful number, since it uses less digits than its factorization.

64769994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12582 (or 12579 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 64769994 is about 8047.9807405336. The cubic root of 64769994 is about 401.5977635482.

The spelling of 64769994 in words is "sixty-four million, seven hundred sixty-nine thousand, nine hundred ninety-four".