87709646280 has 128 divisors (see below), whose sum is σ = 265771756800. Its totient is φ = 23154819072.

The previous prime is 87709646279. The next prime is 87709646293. The reversal of 87709646280 is 8264690778.

It is a self number, because there is not a number n which added to its sum of digits gives 87709646280.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13109176 + ... + 13115864.

It is an arithmetic number, because the mean of its divisors is an integer number (2076341850).

Almost surely, 2^87709646280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87709646280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132885878400).

87709646280 is an abundant number, since it is smaller than the sum of its proper divisors (178062110520).

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

87709646280 is a wasteful number, since it uses less digits than its factorization.

87709646280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7783 (or 7779 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 57.

The spelling of 87709646280 in words is "eighty-seven billion, seven hundred nine million, six hundred forty-six thousand, two hundred eighty".