77888500220 has 12 divisors (see below), whose sum is σ = 163565850504. Its totient is φ = 31155400080.

The previous prime is 77888500171. The next prime is 77888500331. The reversal of 77888500220 is 2200588877.

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, 1947212486 + ... + 1947212525.

It is an arithmetic number, because the mean of its divisors is an integer number (13630487542).

Almost surely, 2^77888500220 is an apocalyptic number.

It is an amenable number.

77888500220 is an abundant number, since it is smaller than the sum of its proper divisors (85677350284).

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

77888500220 is a wasteful number, since it uses less digits than its factorization.

77888500220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3894425020 (or 3894425018 counting only the distinct ones).

The product of its (nonzero) digits is 501760, while the sum is 47.

The spelling of 77888500220 in words is "seventy-seven billion, eight hundred eighty-eight million, five hundred thousand, two hundred twenty".