11977182978 has 32 divisors (see below), whose sum is σ = 25347935232. Its totient is φ = 3765022800.

The previous prime is 11977182967. The next prime is 11977182989. The reversal of 11977182978 is 87928177911.

It is an interprime number because it is at equal distance from previous prime (11977182967) and next prime (11977182989).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601408 + ... + 621003.

It is an arithmetic number, because the mean of its divisors is an integer number (792122976).

Almost surely, 2^11977182978 is an apocalyptic number.

11977182978 is an abundant number, since it is smaller than the sum of its proper divisors (13370752254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11977182978 is a wasteful number, since it uses less digits than its factorization.

11977182978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222510.

The product of its digits is 3556224, while the sum is 60.

The spelling of 11977182978 in words is "eleven billion, nine hundred seventy-seven million, one hundred eighty-two thousand, nine hundred seventy-eight".