77982179459 has 12 divisors (see below), whose sum is σ = 85695734400. Its totient is φ = 70864123008.

The previous prime is 77982179449. The next prime is 77982179543. The reversal of 77982179459 is 95497128977.

It is a de Polignac number, because none of the positive numbers 2^k-77982179459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77982179449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4643939 + ... + 4660700.

It is an arithmetic number, because the mean of its divisors is an integer number (7141311200).

Almost surely, 2^77982179459 is an apocalyptic number.

77982179459 is a deficient number, since it is larger than the sum of its proper divisors (7713554941).

77982179459 is a wasteful number, since it uses less digits than its factorization.

77982179459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9304702 (or 9304685 counting only the distinct ones).

The product of its digits is 80015040, while the sum is 68.

The spelling of 77982179459 in words is "seventy-seven billion, nine hundred eighty-two million, one hundred seventy-nine thousand, four hundred fifty-nine".