687937511085 has 192 divisors, whose sum is σ = 1286641843200. Its totient is φ = 311001753600.

The previous prime is 687937511081. The next prime is 687937511161. The reversal of 687937511085 is 580115739786.

It is a happy number.

It is not a de Polignac number, because 687937511085 - 2² = 687937511081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687937511081) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 546415186 + ... + 546416444.

It is an arithmetic number, because the mean of its divisors is an integer number (6701259600).

Almost surely, 2^687937511085 is an apocalyptic number.

It is an amenable number.

687937511085 is a deficient number, since it is larger than the sum of its proper divisors (598704332115).

687937511085 is a wasteful number, since it uses less digits than its factorization.

687937511085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452 (or 1415 counting only the distinct ones).

The product of its (nonzero) digits is 12700800, while the sum is 60.

The spelling of 687937511085 in words is "six hundred eighty-seven billion, nine hundred thirty-seven million, five hundred eleven thousand, eighty-five".