77316220227 has 4 divisors (see below), whose sum is σ = 103088293640. Its totient is φ = 51544146816.

The previous prime is 77316220213. The next prime is 77316220237. The reversal of 77316220227 is 72202261377.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 77316220227 - 2²⁸ = 77047784771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77316220237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12886036702 + ... + 12886036707.

It is an arithmetic number, because the mean of its divisors is an integer number (25772073410).

Almost surely, 2^77316220227 is an apocalyptic number.

77316220227 is a deficient number, since it is larger than the sum of its proper divisors (25772073413).

77316220227 is a wasteful number, since it uses less digits than its factorization.

77316220227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25772073412.

The product of its (nonzero) digits is 98784, while the sum is 39.

The spelling of 77316220227 in words is "seventy-seven billion, three hundred sixteen million, two hundred twenty thousand, two hundred twenty-seven".