77223187971 has 28 divisors (see below), whose sum is σ = 115808089248. Its totient is φ = 51470444304.

The previous prime is 77223187963. The next prime is 77223188027. The reversal of 77223187971 is 17978132277.

It is not a de Polignac number, because 77223187971 - 2³ = 77223187963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77223187571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 4228566 + ... + 4246788.

Almost surely, 2^77223187971 is an apocalyptic number.

77223187971 is a deficient number, since it is larger than the sum of its proper divisors (38584901277).

77223187971 is an equidigital number, since it uses as much as digits as its factorization.

77223187971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24054 (or 24039 counting only the distinct ones).

The product of its digits is 2074464, while the sum is 54.

The spelling of 77223187971 in words is "seventy-seven billion, two hundred twenty-three million, one hundred eighty-seven thousand, nine hundred seventy-one".