659640181936 has 20 divisors (see below), whose sum is σ = 1305245467872. Its totient is φ = 322802641856.

The previous prime is 659640181919. The next prime is 659640181951. The reversal of 659640181936 is 639181046956.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438589795 + ... + 438591298.

Almost surely, 2^659640181936 is an apocalyptic number.

It is an amenable number.

659640181936 is a deficient number, since it is larger than the sum of its proper divisors (645605285936).

659640181936 is a wasteful number, since it uses less digits than its factorization.

659640181936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877181148 (or 877181142 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 58.

The spelling of 659640181936 in words is "six hundred fifty-nine billion, six hundred forty million, one hundred eighty-one thousand, nine hundred thirty-six".