77972000220 has 48 divisors (see below), whose sum is σ = 242579557920. Its totient is φ = 20792533248.

The previous prime is 77972000219. The next prime is 77972000221. The reversal of 77972000220 is 2200027977.

It is an interprime number because it is at equal distance from previous prime (77972000219) and next prime (77972000221).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77972000221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72195757 + ... + 72196836.

It is an arithmetic number, because the mean of its divisors is an integer number (5053740790).

Almost surely, 2^77972000220 is an apocalyptic number.

It is an amenable number.

77972000220 is an abundant number, since it is smaller than the sum of its proper divisors (164607557700).

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

77972000220 is a wasteful number, since it uses less digits than its factorization.

77972000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144392611 (or 144392603 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The spelling of 77972000220 in words is "seventy-seven billion, nine hundred seventy-two million, two hundred twenty", and thus it is an aban number.