64731254634 has 48 divisors (see below), whose sum is σ = 141793142400. Its totient is φ = 21340143360.

The previous prime is 64731254633. The next prime is 64731254657. The reversal of 64731254634 is 43645213746.

64731254634 is a `hidden beast` number, since 6 + 4 + 7 + 3 + 1 + 2 + 5 + 4 + 634 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 64731254634.

It is not an unprimeable number, because it can be changed into a prime (64731254633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2731167 + ... + 2754765.

It is an arithmetic number, because the mean of its divisors is an integer number (2954023800).

Almost surely, 2^64731254634 is an apocalyptic number.

64731254634 is an abundant number, since it is smaller than the sum of its proper divisors (77061887766).

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

64731254634 is a wasteful number, since it uses less digits than its factorization.

64731254634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25275 (or 25272 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 45.

The spelling of 64731254634 in words is "sixty-four billion, seven hundred thirty-one million, two hundred fifty-four thousand, six hundred thirty-four".