64812996 has 18 divisors (see below), whose sum is σ = 163832942. Its totient is φ = 21604320.

The previous prime is 64812991. The next prime is 64813019. The reversal of 64812996 is 69921846.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 64641600 + 171396 = 8040^2 + 414^2 .

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

It is not an unprimeable number, because it can be changed into a prime (64812991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 900145 + ... + 900216.

Almost surely, 2^64812996 is an apocalyptic number.

It is an amenable number.

64812996 is an abundant number, since it is smaller than the sum of its proper divisors (99019946).

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

64812996 is a wasteful number, since it uses less digits than its factorization.

64812996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800371 (or 1800366 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 64812996 is about 8050.6518990700. The cubic root of 64812996 is about 401.6866199539.

The spelling of 64812996 in words is "sixty-four million, eight hundred twelve thousand, nine hundred ninety-six".