64407434472 has 80 divisors (see below), whose sum is σ = 191012277060. Its totient is φ = 20206250496.

The previous prime is 64407434467. The next prime is 64407434473. The reversal of 64407434472 is 27443470446.

It can be written as a sum of positive squares in 2 ways, for example, as 50519754756 + 13887679716 = 224766^2 + 117846^2 .

It is not an unprimeable number, because it can be changed into a prime (64407434473) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2912343 + ... + 2934374.

Almost surely, 2^64407434472 is an apocalyptic number.

It is an amenable number.

64407434472 is an abundant number, since it is smaller than the sum of its proper divisors (126604842588).

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

64407434472 is a wasteful number, since it uses less digits than its factorization.

64407434472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5846752 (or 5846739 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 45.

The spelling of 64407434472 in words is "sixty-four billion, four hundred seven million, four hundred thirty-four thousand, four hundred seventy-two".