13807817525 has 12 divisors (see below), whose sum is σ = 17278776900. Its totient is φ = 10944910080.

The previous prime is 13807817519. The next prime is 13807817581. The reversal of 13807817525 is 52571870831.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 213656689 + 13594160836 = 14617^2 + 116594^2 .

It is not a de Polignac number, because 13807817525 - 2¹² = 13807813429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13807817525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2530820 + ... + 2536269.

It is an arithmetic number, because the mean of its divisors is an integer number (1439898075).

Almost surely, 2^13807817525 is an apocalyptic number.

It is an amenable number.

13807817525 is a deficient number, since it is larger than the sum of its proper divisors (3470959375).

13807817525 is a wasteful number, since it uses less digits than its factorization.

13807817525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5067208 (or 5067203 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 47.

The spelling of 13807817525 in words is "thirteen billion, eight hundred seven million, eight hundred seventeen thousand, five hundred twenty-five".