64634744507 has 8 divisors (see below), whose sum is σ = 65537321520. Its totient is φ = 63732631680.

The previous prime is 64634744479. The next prime is 64634744513. The reversal of 64634744507 is 70544743646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64634744507 - 2¹² = 64634740411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64634743507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169244 + ... + 397382.

It is an arithmetic number, because the mean of its divisors is an integer number (8192165190).

Almost surely, 2^64634744507 is an apocalyptic number.

64634744507 is a deficient number, since it is larger than the sum of its proper divisors (902577013).

64634744507 is a wasteful number, since it uses less digits than its factorization.

64634744507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232093.

The product of its (nonzero) digits is 6773760, while the sum is 50.

The spelling of 64634744507 in words is "sixty-four billion, six hundred thirty-four million, seven hundred forty-four thousand, five hundred seven".