79777129144 has 16 divisors (see below), whose sum is σ = 149592586320. Its totient is φ = 39885772800.

The previous prime is 79777129141. The next prime is 79777129177. The reversal of 79777129144 is 44192177797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79777129141) 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, 224932 + ... + 458419.

It is an arithmetic number, because the mean of its divisors is an integer number (9349536645).

Almost surely, 2^79777129144 is an apocalyptic number.

It is an amenable number.

79777129144 is a deficient number, since it is larger than the sum of its proper divisors (69815457176).

79777129144 is a wasteful number, since it uses less digits than its factorization.

79777129144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697950 (or 697946 counting only the distinct ones).

The product of its digits is 6223392, while the sum is 58.

The spelling of 79777129144 in words is "seventy-nine billion, seven hundred seventy-seven million, one hundred twenty-nine thousand, one hundred forty-four".