64513451310215 has 4 divisors (see below), whose sum is σ = 77416141572264. Its totient is φ = 51610761048168.

The previous prime is 64513451310197. The next prime is 64513451310221. The reversal of 64513451310215 is 51201315431546.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64513451310215 - 2⁴⁴ = 46921265265799 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 6451345131017 + ... + 6451345131026.

It is an arithmetic number, because the mean of its divisors is an integer number (19354035393066).

Almost surely, 2^{64513451310215} is an apocalyptic number.

64513451310215 is a deficient number, since it is larger than the sum of its proper divisors (12902690262049).

64513451310215 is a wasteful number, since it uses less digits than its factorization.

64513451310215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12902690262048.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 64513451310215 in words is "sixty-four trillion, five hundred thirteen billion, four hundred fifty-one million, three hundred ten thousand, two hundred fifteen".