87135678777620 has 48 divisors (see below), whose sum is σ = 208299045564288. Its totient is φ = 30308062181760.

The previous prime is 87135678777611. The next prime is 87135678777709. The reversal of 87135678777620 is 2677787653178.

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, 8610239879 + ... + 8610249998.

It is an arithmetic number, because the mean of its divisors is an integer number (4339563449256).

Almost surely, 2^{87135678777620} is an apocalyptic number.

It is an amenable number.

87135678777620 is an abundant number, since it is smaller than the sum of its proper divisors (121163366786668).

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

87135678777620 is a wasteful number, since it uses less digits than its factorization.

87135678777620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17220489920 (or 17220489918 counting only the distinct ones).

The product of its (nonzero) digits is 1161699840, while the sum is 74.

The spelling of 87135678777620 in words is "eighty-seven trillion, one hundred thirty-five billion, six hundred seventy-eight million, seven hundred seventy-seven thousand, six hundred twenty".