687160439651 has 16 divisors (see below), whose sum is σ = 826707260160. Its totient is φ = 557962486560.

The previous prime is 687160439639. The next prime is 687160439737. The reversal of 687160439651 is 156934061786.

It is a cyclic number.

It is not a de Polignac number, because 687160439651 - 2⁶ = 687160439587 is a prime.

It is a super-2 number, since 2×687160439651² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687160439051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2293721 + ... + 2575941.

It is an arithmetic number, because the mean of its divisors is an integer number (51669203760).

Almost surely, 2^687160439651 is an apocalyptic number.

687160439651 is a deficient number, since it is larger than the sum of its proper divisors (139546820509).

687160439651 is a wasteful number, since it uses less digits than its factorization.

687160439651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300554.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 687160439651 in words is "six hundred eighty-seven billion, one hundred sixty million, four hundred thirty-nine thousand, six hundred fifty-one".