64692244872 has 96 divisors (see below), whose sum is σ = 176061483000. Its totient is φ = 21459271680.

The previous prime is 64692244853. The next prime is 64692244889. The reversal of 64692244872 is 27844229646.

It is a happy number.

64692244872 is a `hidden beast` number, since 6 + 46 + 92 + 2 + 448 + 72 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 61497056196 + 3195188676 = 247986^2 + 56526^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20412504 + ... + 20415672.

Almost surely, 2^64692244872 is an apocalyptic number.

It is an amenable number.

64692244872 is an abundant number, since it is smaller than the sum of its proper divisors (111369238128).

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

64692244872 is a wasteful number, since it uses less digits than its factorization.

64692244872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4471 (or 4464 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 54.

The spelling of 64692244872 in words is "sixty-four billion, six hundred ninety-two million, two hundred forty-four thousand, eight hundred seventy-two".