11977113601 has 4 divisors (see below), whose sum is σ = 12300819412. Its totient is φ = 11653407792.

The previous prime is 11977113557. The next prime is 11977113667. The reversal of 11977113601 is 10631177911.

It is a Cunningham number, because it is equal to 109440²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10631177911 = 839 ⋅12671249.

It can be written as a sum of positive squares in 2 ways, for example, as 10717218576 + 1259895025 = 103524^2 + 35495^2 .

It is a cyclic number.

It is not a de Polignac number, because 11977113601 - 2⁹ = 11977113089 is a prime.

It is a super-2 number, since 2×11977113601² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 323705773 = 11977113601 / (1 + 1 + 9 + 7 + 7 + 1 + 1 + 3 + 6 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11977113691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161852850 + ... + 161852923.

It is an arithmetic number, because the mean of its divisors is an integer number (3075204853).

Almost surely, 2^11977113601 is an apocalyptic number.

It is an amenable number.

11977113601 is a deficient number, since it is larger than the sum of its proper divisors (323705811).

11977113601 is an equidigital number, since it uses as much as digits as its factorization.

11977113601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323705810.

The product of its (nonzero) digits is 7938, while the sum is 37.

The spelling of 11977113601 in words is "eleven billion, nine hundred seventy-seven million, one hundred thirteen thousand, six hundred one".