13856964757 has 4 divisors (see below), whose sum is σ = 14231477356. Its totient is φ = 13482452160.

The previous prime is 13856964749. The next prime is 13856964763. The reversal of 13856964757 is 75746965831.

It is a happy number.

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 13001928676 + 855036081 = 114026^2 + 29241^2 .

It is a cyclic number.

It is not a de Polignac number, because 13856964757 - 2³ = 13856964749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13856964695 and 13856964704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13856964557) 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, 187256244 + ... + 187256317.

It is an arithmetic number, because the mean of its divisors is an integer number (3557869339).

Almost surely, 2^13856964757 is an apocalyptic number.

It is an amenable number.

13856964757 is a deficient number, since it is larger than the sum of its proper divisors (374512599).

13856964757 is an equidigital number, since it uses as much as digits as its factorization.

13856964757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374512598.

The product of its digits is 38102400, while the sum is 61.

The spelling of 13856964757 in words is "thirteen billion, eight hundred fifty-six million, nine hundred sixty-four thousand, seven hundred fifty-seven".