64078696457515 has 16 divisors (see below), whose sum is σ = 76913473160160. Its totient is φ = 51250266881280.

The previous prime is 64078696457491. The next prime is 64078696457639. The reversal of 64078696457515 is 51575469687046.

It is not a de Polignac number, because 64078696457515 - 2⁷ = 64078696457387 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445200381 + ... + 445344289.

It is an arithmetic number, because the mean of its divisors is an integer number (4807092072510).

Almost surely, 2^{64078696457515} is an apocalyptic number.

64078696457515 is a deficient number, since it is larger than the sum of its proper divisors (12834776702645).

64078696457515 is a wasteful number, since it uses less digits than its factorization.

64078696457515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165342.

The product of its (nonzero) digits is 1524096000, while the sum is 73.

The spelling of 64078696457515 in words is "sixty-four trillion, seventy-eight billion, six hundred ninety-six million, four hundred fifty-seven thousand, five hundred fifteen".