13945756457 has 4 divisors (see below), whose sum is σ = 14026367940. Its totient is φ = 13865144976.

The previous prime is 13945756423. The next prime is 13945756463. The reversal of 13945756457 is 75465754931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13181565721 + 764190736 = 114811^2 + 27644^2 .

It is a cyclic number.

It is not a de Polignac number, because 13945756457 - 2¹² = 13945752361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13945756157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40305482 + ... + 40305827.

It is an arithmetic number, because the mean of its divisors is an integer number (3506591985).

Almost surely, 2^13945756457 is an apocalyptic number.

It is an amenable number.

13945756457 is a deficient number, since it is larger than the sum of its proper divisors (80611483).

13945756457 is an equidigital number, since it uses as much as digits as its factorization.

13945756457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80611482.

The product of its digits is 15876000, while the sum is 56.

The spelling of 13945756457 in words is "thirteen billion, nine hundred forty-five million, seven hundred fifty-six thousand, four hundred fifty-seven".