687515004136 has 16 divisors (see below), whose sum is σ = 1289099548800. Its totient is φ = 343755124464.

The previous prime is 687515004131. The next prime is 687515004181. The reversal of 687515004136 is 631400515786.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (687515004131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1813545 + ... + 2159623.

It is an arithmetic number, because the mean of its divisors is an integer number (80568721800).

Almost surely, 2^687515004136 is an apocalyptic number.

It is an amenable number.

687515004136 is a deficient number, since it is larger than the sum of its proper divisors (601584544664).

687515004136 is a wasteful number, since it uses less digits than its factorization.

687515004136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594408 (or 594404 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 687515004136 in words is "six hundred eighty-seven billion, five hundred fifteen million, four thousand, one hundred thirty-six".