64477133316 has 36 divisors (see below), whose sum is σ = 172571152572. Its totient is φ = 20228120064.

The previous prime is 64477133311. The next prime is 64477133353. The reversal of 64477133316 is 61333177446.

It can be written as a sum of positive squares in 2 ways, for example, as 57931676100 + 6545457216 = 240690^2 + 80904^2 .

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

It is not an unprimeable number, because it can be changed into a prime (64477133311) 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, 52676785 + ... + 52678008.

It is an arithmetic number, because the mean of its divisors is an integer number (4793643127).

Almost surely, 2^64477133316 is an apocalyptic number.

It is an amenable number.

64477133316 is an abundant number, since it is smaller than the sum of its proper divisors (108094019256).

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

64477133316 is a wasteful number, since it uses less digits than its factorization.

64477133316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105354820 (or 105354815 counting only the distinct ones).

The product of its digits is 762048, while the sum is 45.

The spelling of 64477133316 in words is "sixty-four billion, four hundred seventy-seven million, one hundred thirty-three thousand, three hundred sixteen".