664464523743215 has 32 divisors (see below), whose sum is σ = 890234366083776. Its totient is φ = 472946018595840.

The previous prime is 664464523743157. The next prime is 664464523743253. The reversal of 664464523743215 is 512347325464466.

It is not a de Polignac number, because 664464523743215 - 2⁶ = 664464523743151 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 31 ways as a sum of consecutive naturals, for example, 1501766924 + ... + 1502209313.

It is an arithmetic number, because the mean of its divisors is an integer number (27819823940118).

Almost surely, 2^{664464523743215} is an apocalyptic number.

664464523743215 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

664464523743215 is a deficient number, since it is larger than the sum of its proper divisors (225769842340561).

664464523743215 is a wasteful number, since it uses less digits than its factorization.

664464523743215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3003976379.

The product of its digits is 348364800, while the sum is 62.

The spelling of 664464523743215 in words is "six hundred sixty-four trillion, four hundred sixty-four billion, five hundred twenty-three million, seven hundred forty-three thousand, two hundred fifteen".