13957315643 has 2 divisors, whose sum is σ = 13957315644. Its totient is φ = 13957315642.

The previous prime is 13957315627. The next prime is 13957315649. The reversal of 13957315643 is 34651375931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13957315643 - 2⁴ = 13957315627 is a prime.

It is not a weakly prime, because it can be changed into another prime (13957315649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6978657821 + 6978657822.

It is an arithmetic number, because the mean of its divisors is an integer number (6978657822).

Almost surely, 2^13957315643 is an apocalyptic number.

13957315643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13957315643 is an equidigital number, since it uses as much as digits as its factorization.

13957315643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 47.

The spelling of 13957315643 in words is "thirteen billion, nine hundred fifty-seven million, three hundred fifteen thousand, six hundred forty-three".