13201811977 has 2 divisors, whose sum is σ = 13201811978. Its totient is φ = 13201811976.

The previous prime is 13201811939. The next prime is 13201812031. The reversal of 13201811977 is 77911810231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12157488121 + 1044323856 = 110261^2 + 32316^2 .

It is a cyclic number.

It is not a de Polignac number, because 13201811977 - 2¹⁵ = 13201779209 is a prime.

It is not a weakly prime, because it can be changed into another prime (13201812977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6600905988 + 6600905989.

It is an arithmetic number, because the mean of its divisors is an integer number (6600905989).

Almost surely, 2^13201811977 is an apocalyptic number.

It is an amenable number.

13201811977 is a deficient number, since it is larger than the sum of its proper divisors (1).

13201811977 is an equidigital number, since it uses as much as digits as its factorization.

13201811977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 40.

The spelling of 13201811977 in words is "thirteen billion, two hundred one million, eight hundred eleven thousand, nine hundred seventy-seven".