77055675221 has 16 divisors (see below), whose sum is σ = 93218928000. Its totient is φ = 62287178688.

The previous prime is 77055675217. The next prime is 77055675247. The reversal of 77055675221 is 12257655077.

It is not a de Polignac number, because 77055675221 - 2² = 77055675217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77055671221) 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 15 ways as a sum of consecutive naturals, for example, 4405046 + ... + 4422503.

It is an arithmetic number, because the mean of its divisors is an integer number (5826183000).

Almost surely, 2^77055675221 is an apocalyptic number.

It is an amenable number.

77055675221 is a deficient number, since it is larger than the sum of its proper divisors (16163252779).

77055675221 is a wasteful number, since it uses less digits than its factorization.

77055675221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8827628.

The product of its (nonzero) digits is 1029000, while the sum is 47.

The spelling of 77055675221 in words is "seventy-seven billion, fifty-five million, six hundred seventy-five thousand, two hundred twenty-one".