64740197592 has 64 divisors (see below), whose sum is σ = 205524441600. Its totient is φ = 18497198880.

The previous prime is 64740197537. The next prime is 64740197609. The reversal of 64740197592 is 29579104746.

64740197592 is a `hidden beast` number, since 6 + 4 + 7 + 40 + 1 + 9 + 7 + 592 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21407284 + ... + 21410307.

It is an arithmetic number, because the mean of its divisors is an integer number (3211319400).

Almost surely, 2^64740197592 is an apocalyptic number.

It is an amenable number.

64740197592 is an abundant number, since it is smaller than the sum of its proper divisors (140784244008).

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

64740197592 is a wasteful number, since it uses less digits than its factorization.

64740197592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42817613 (or 42817603 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 64740197592 in words is "sixty-four billion, seven hundred forty million, one hundred ninety-seven thousand, five hundred ninety-two".