13913519857 has 4 divisors (see below), whose sum is σ = 13948217316. Its totient is φ = 13878822400.

The previous prime is 13913519821. The next prime is 13913519869. The reversal of 13913519857 is 75891531931.

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 13271961616 + 641558241 = 115204^2 + 25329^2 .

It is a cyclic number.

It is not a de Polignac number, because 13913519857 - 2²⁷ = 13779302129 is a prime.

It is a super-2 number, since 2×13913519857² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13913519657) 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, 17348128 + ... + 17348929.

It is an arithmetic number, because the mean of its divisors is an integer number (3487054329).

Almost surely, 2^13913519857 is an apocalyptic number.

It is an amenable number.

13913519857 is a deficient number, since it is larger than the sum of its proper divisors (34697459).

13913519857 is an equidigital number, since it uses as much as digits as its factorization.

13913519857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34697458.

The product of its digits is 1020600, while the sum is 52.

The spelling of 13913519857 in words is "thirteen billion, nine hundred thirteen million, five hundred nineteen thousand, eight hundred fifty-seven".