664342144515 has 192 divisors, whose sum is σ = 1382883840000. Its totient is φ = 288674979840.

The previous prime is 664342144489. The next prime is 664342144549. The reversal of 664342144515 is 515441243466.

664342144515 is a `hidden beast` number, since 6 + 64 + 34 + 2 + 1 + 44 + 515 = 666.

It is not a de Polignac number, because 664342144515 - 2⁵ = 664342144483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 531898611 + ... + 531899859.

It is an arithmetic number, because the mean of its divisors is an integer number (7202520000).

Almost surely, 2^664342144515 is an apocalyptic number.

664342144515 is an abundant number, since it is smaller than the sum of its proper divisors (718541695485).

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

664342144515 is a wasteful number, since it uses less digits than its factorization.

664342144515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2322 (or 2319 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The spelling of 664342144515 in words is "six hundred sixty-four billion, three hundred forty-two million, one hundred forty-four thousand, five hundred fifteen".