77215405055500 has 48 divisors (see below), whose sum is σ = 168639537777984. Its totient is φ = 30885961814400.

The previous prime is 77215405055441. The next prime is 77215405055539. The reversal of 77215405055500 is 555050451277.

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, 94863249 + ... + 95673751.

It is an arithmetic number, because the mean of its divisors is an integer number (3513323703708).

Almost surely, 2^{77215405055500} is an apocalyptic number.

It is an amenable number.

77215405055500 is an abundant number, since it is smaller than the sum of its proper divisors (91424132722484).

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

77215405055500 is a wasteful number, since it uses less digits than its factorization.

77215405055500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001059 (or 1001047 counting only the distinct ones).

The product of its (nonzero) digits is 1225000, while the sum is 46.

The spelling of 77215405055500 in words is "seventy-seven trillion, two hundred fifteen billion, four hundred five million, fifty-five thousand, five hundred".