87722190721560 has 64 divisors (see below), whose sum is σ = 267094431475200. Its totient is φ = 23043441142656.

The previous prime is 87722190721513. The next prime is 87722190721597. The reversal of 87722190721560 is 6512709122778.

It is a happy number.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 87722190721560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5455352080 + ... + 5455368159.

It is an arithmetic number, because the mean of its divisors is an integer number (4173350491800).

Almost surely, 2^{87722190721560} is an apocalyptic number.

It is an amenable number.

87722190721560 is an abundant number, since it is smaller than the sum of its proper divisors (179372240753640).

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

87722190721560 is a wasteful number, since it uses less digits than its factorization.

87722190721560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10910720320 (or 10910720316 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 57.

The spelling of 87722190721560 in words is "eighty-seven trillion, seven hundred twenty-two billion, one hundred ninety million, seven hundred twenty-one thousand, five hundred sixty".