11977182977 has 4 divisors (see below), whose sum is σ = 12255722160. Its totient is φ = 11698643796.

The previous prime is 11977182967. The next prime is 11977182989. The reversal of 11977182977 is 77928177911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77928177911 = 67 ⋅1163107133.

It is a cyclic number.

It is not a de Polignac number, because 11977182977 - 2¹⁶ = 11977117441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11977182967) 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, 139269527 + ... + 139269612.

It is an arithmetic number, because the mean of its divisors is an integer number (3063930540).

Almost surely, 2^11977182977 is an apocalyptic number.

It is an amenable number.

11977182977 is a deficient number, since it is larger than the sum of its proper divisors (278539183).

11977182977 is an equidigital number, since it uses as much as digits as its factorization.

11977182977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278539182.

The product of its digits is 3111696, while the sum is 59.

The spelling of 11977182977 in words is "eleven billion, nine hundred seventy-seven million, one hundred eighty-two thousand, nine hundred seventy-seven".