77603550164 has 24 divisors (see below), whose sum is σ = 155314000128. Its totient is φ = 33235757280.

The previous prime is 77603550161. The next prime is 77603550187. The reversal of 77603550164 is 46105530677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77603550161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913052 + ... + 994419.

It is an arithmetic number, because the mean of its divisors is an integer number (6471416672).

Almost surely, 2^77603550164 is an apocalyptic number.

It is an amenable number.

77603550164 is an abundant number, since it is smaller than the sum of its proper divisors (77710449964).

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

77603550164 is a wasteful number, since it uses less digits than its factorization.

77603550164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1908935 (or 1908933 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 44.

The spelling of 77603550164 in words is "seventy-seven billion, six hundred three million, five hundred fifty thousand, one hundred sixty-four".