13877044661 has 2 divisors, whose sum is σ = 13877044662. Its totient is φ = 13877044660.

The previous prime is 13877044639. The next prime is 13877044669. The reversal of 13877044661 is 16644077831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8685121636 + 5191923025 = 93194^2 + 72055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13877044661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13877044669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6938522330 + 6938522331.

It is an arithmetic number, because the mean of its divisors is an integer number (6938522331).

Almost surely, 2^13877044661 is an apocalyptic number.

It is an amenable number.

13877044661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13877044661 is an equidigital number, since it uses as much as digits as its factorization.

13877044661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 47.

The spelling of 13877044661 in words is "thirteen billion, eight hundred seventy-seven million, forty-four thousand, six hundred sixty-one".