13777494971 has 2 divisors, whose sum is σ = 13777494972. Its totient is φ = 13777494970.

The previous prime is 13777494959. The next prime is 13777495001. The reversal of 13777494971 is 17949477731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13777494971 - 2¹⁴ = 13777478587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13777494971.

It is not a weakly prime, because it can be changed into another prime (13777494271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6888747485 + 6888747486.

It is an arithmetic number, because the mean of its divisors is an integer number (6888747486).

Almost surely, 2^13777494971 is an apocalyptic number.

13777494971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13777494971 is an equidigital number, since it uses as much as digits as its factorization.

13777494971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9335088, while the sum is 59.

The spelling of 13777494971 in words is "thirteen billion, seven hundred seventy-seven million, four hundred ninety-four thousand, nine hundred seventy-one".