87389756455220 has 48 divisors (see below), whose sum is σ = 183980016048528. Its totient is φ = 34867996262400.

The previous prime is 87389756455219. The next prime is 87389756455373. The reversal of 87389756455220 is 2255465798378.

It can be written as a sum of positive squares in 8 ways, for example, as 16210060973584 + 71179695481636 = 4026172^2 + 8436806^2 .

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, 537844232 + ... + 538006688.

It is an arithmetic number, because the mean of its divisors is an integer number (3832917001011).

Almost surely, 2^{87389756455220} is an apocalyptic number.

It is an amenable number.

87389756455220 is an abundant number, since it is smaller than the sum of its proper divisors (96590259593308).

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

87389756455220 is a wasteful number, since it uses less digits than its factorization.

87389756455220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229940 (or 229938 counting only the distinct ones).

The product of its (nonzero) digits is 1016064000, while the sum is 71.

The spelling of 87389756455220 in words is "eighty-seven trillion, three hundred eighty-nine billion, seven hundred fifty-six million, four hundred fifty-five thousand, two hundred twenty".