687515004135 has 12 divisors (see below), whose sum is σ = 1191692673912. Its totient is φ = 366674668848.

The previous prime is 687515004131. The next prime is 687515004181. The reversal of 687515004135 is 531400515786.

687515004135 is a `hidden beast` number, since 6 + 8 + 7 + 5 + 1 + 500 + 4 + 135 = 666.

It is not a de Polignac number, because 687515004135 - 2² = 687515004131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 15278111203 = 687515004135 / (6 + 8 + 7 + 5 + 1 + 5 + 0 + 0 + 4 + 1 + 3 + 5).

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 7639055557 + ... + 7639055646.

It is an arithmetic number, because the mean of its divisors is an integer number (99307722826).

Almost surely, 2^687515004135 is an apocalyptic number.

687515004135 is a deficient number, since it is larger than the sum of its proper divisors (504177669777).

687515004135 is a wasteful number, since it uses less digits than its factorization.

687515004135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15278111214 (or 15278111211 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 687515004135 in words is "six hundred eighty-seven billion, five hundred fifteen million, four thousand, one hundred thirty-five".