77043627271221 has 24 divisors (see below), whose sum is σ = 111251565521856. Its totient is φ = 47404225814400.

The previous prime is 77043627271211. The next prime is 77043627271229. The reversal of 77043627271221 is 12217272634077.

It is not a de Polignac number, because 77043627271221 - 2²⁷ = 77043493053493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77043627271229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8272305 + ... + 14917046.

It is an arithmetic number, because the mean of its divisors is an integer number (4635481896744).

Almost surely, 2^{77043627271221} is an apocalyptic number.

It is an amenable number.

77043627271221 is a deficient number, since it is larger than the sum of its proper divisors (34207938250635).

77043627271221 is a wasteful number, since it uses less digits than its factorization.

77043627271221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23195933 (or 23195920 counting only the distinct ones).

The product of its (nonzero) digits is 2765952, while the sum is 51.

The spelling of 77043627271221 in words is "seventy-seven trillion, forty-three billion, six hundred twenty-seven million, two hundred seventy-one thousand, two hundred twenty-one".