13037985857 has 8 divisors (see below), whose sum is σ = 14091600936. Its totient is φ = 11991612672.

The previous prime is 13037985823. The next prime is 13037985871. The reversal of 13037985857 is 75858973031.

It is a happy number.

It is a Cunningham number, because it is equal to 114184²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 13037985856 = 1^2 + 114184^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13037985857 - 2⁸ = 13037985601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13037985557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1806728 + ... + 1813929.

It is an arithmetic number, because the mean of its divisors is an integer number (1761450117).

Almost surely, 2^13037985857 is an apocalyptic number.

It is an amenable number.

13037985857 is a deficient number, since it is larger than the sum of its proper divisors (1053615079).

13037985857 is a wasteful number, since it uses less digits than its factorization.

13037985857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3620947.

The product of its (nonzero) digits is 6350400, while the sum is 56.

The spelling of 13037985857 in words is "thirteen billion, thirty-seven million, nine hundred eighty-five thousand, eight hundred fifty-seven".