87680685720 has 32 divisors (see below), whose sum is σ = 263042057520. Its totient is φ = 23381516160.

The previous prime is 87680685643. The next prime is 87680685761. The reversal of 87680685720 is 2758608678.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365336071 + ... + 365336310.

Almost surely, 2^87680685720 is an apocalyptic number.

It is an amenable number.

87680685720 is an abundant number, since it is smaller than the sum of its proper divisors (175361371800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87680685720 is a wasteful number, since it uses less digits than its factorization.

87680685720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730672395 (or 730672391 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 57.

The spelling of 87680685720 in words is "eighty-seven billion, six hundred eighty million, six hundred eighty-five thousand, seven hundred twenty".