87722537221720 has 16 divisors (see below), whose sum is σ = 197375708748960. Its totient is φ = 35089014888672.

The previous prime is 87722537221699. The next prime is 87722537221771. The reversal of 87722537221720 is 2712273522778.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1096531715232 + ... + 1096531715311.

It is an arithmetic number, because the mean of its divisors is an integer number (12335981796810).

Almost surely, 2^{87722537221720} is an apocalyptic number.

It is an amenable number.

87722537221720 is an abundant number, since it is smaller than the sum of its proper divisors (109653171527240).

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

87722537221720 is a wasteful number, since it uses less digits than its factorization.

87722537221720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193063430554 (or 2193063430550 counting only the distinct ones).

The product of its (nonzero) digits is 9219840, while the sum is 55.

The spelling of 87722537221720 in words is "eighty-seven trillion, seven hundred twenty-two billion, five hundred thirty-seven million, two hundred twenty-one thousand, seven hundred twenty".