13957831785 has 16 divisors (see below), whose sum is σ = 22615223040. Its totient is φ = 7349946240.

The previous prime is 13957831763. The next prime is 13957831799. The reversal of 13957831785 is 58713875931.

It is not a de Polignac number, because 13957831785 - 2²⁶ = 13890722921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5888196 + ... + 5890565.

It is an arithmetic number, because the mean of its divisors is an integer number (1413451440).

Almost surely, 2^13957831785 is an apocalyptic number.

13957831785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13957831785 is a deficient number, since it is larger than the sum of its proper divisors (8657391255).

13957831785 is a wasteful number, since it uses less digits than its factorization.

13957831785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11778848.

The product of its digits is 6350400, while the sum is 57.

The spelling of 13957831785 in words is "thirteen billion, nine hundred fifty-seven million, eight hundred thirty-one thousand, seven hundred eighty-five".