77261567272220 has 48 divisors (see below), whose sum is σ = 162420857635680. Its totient is φ = 30871949758464.

The previous prime is 77261567272189. The next prime is 77261567272231. The reversal of 77261567272220 is 2227276516277.

It is a super-2 number, since 2×77261567272220² (a number of 29 digits) contains 22 as substring.

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, 860242676 + ... + 860332484.

It is an arithmetic number, because the mean of its divisors is an integer number (3383767867410).

Almost surely, 2^{77261567272220} is an apocalyptic number.

It is an amenable number.

77261567272220 is an abundant number, since it is smaller than the sum of its proper divisors (85159290363460).

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

77261567272220 is a wasteful number, since it uses less digits than its factorization.

77261567272220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134822 (or 134820 counting only the distinct ones).

The product of its (nonzero) digits is 13829760, while the sum is 56.

The spelling of 77261567272220 in words is "seventy-seven trillion, two hundred sixty-one billion, five hundred sixty-seven million, two hundred seventy-two thousand, two hundred twenty".