64515499834956 has 12 divisors (see below), whose sum is σ = 150536166281592. Its totient is φ = 21505166611648.

The previous prime is 64515499834949. The next prime is 64515499834993. The reversal of 64515499834956 is 65943899451546.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2688145826445 + ... + 2688145826468.

It is an arithmetic number, because the mean of its divisors is an integer number (12544680523466).

Almost surely, 2^{64515499834956} is an apocalyptic number.

It is an amenable number.

64515499834956 is an abundant number, since it is smaller than the sum of its proper divisors (86020666446636).

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

64515499834956 is a wasteful number, since it uses less digits than its factorization.

64515499834956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5376291652920 (or 5376291652918 counting only the distinct ones).

The product of its digits is 5038848000, while the sum is 78.

The spelling of 64515499834956 in words is "sixty-four trillion, five hundred fifteen billion, four hundred ninety-nine million, eight hundred thirty-four thousand, nine hundred fifty-six".