64544319792 has 60 divisors (see below), whose sum is σ = 186461381184. Its totient is φ = 20820746880.

The previous prime is 64544319787. The next prime is 64544319793. The reversal of 64544319792 is 29791344546.

64544319792 is a `hidden beast` number, since 6 + 4 + 5 + 443 + 197 + 9 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (64544319793) 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, 7224963 + ... + 7233890.

Almost surely, 2^64544319792 is an apocalyptic number.

64544319792 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

64544319792 is an abundant number, since it is smaller than the sum of its proper divisors (121917061392).

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

64544319792 is a wasteful number, since it uses less digits than its factorization.

64544319792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14458898 (or 14458889 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 64544319792 in words is "sixty-four billion, five hundred forty-four million, three hundred nineteen thousand, seven hundred ninety-two".