77490867979 has 16 divisors (see below), whose sum is σ = 92676326400. Its totient is φ = 63350796960.

The previous prime is 77490867931. The next prime is 77490868009. The reversal of 77490867979 is 97976809477.

It is a cyclic number.

It is not a de Polignac number, because 77490867979 - 2¹¹ = 77490865931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77490861979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633367 + ... + 745744.

It is an arithmetic number, because the mean of its divisors is an integer number (5792270400).

Almost surely, 2^77490867979 is an apocalyptic number.

77490867979 is a deficient number, since it is larger than the sum of its proper divisors (15185458421).

77490867979 is a wasteful number, since it uses less digits than its factorization.

77490867979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379490.

The product of its (nonzero) digits is 336063168, while the sum is 73.

The spelling of 77490867979 in words is "seventy-seven billion, four hundred ninety million, eight hundred sixty-seven thousand, nine hundred seventy-nine".