25665251113 has 16 divisors (see below), whose sum is σ = 26273699136. Its totient is φ = 25061699520.

The previous prime is 25665251107. The next prime is 25665251123. The reversal of 25665251113 is 31115256652.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25665251113 - 2²⁵ = 25631696681 is a prime.

It is a super-2 number, since 2×25665251113² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25665251123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15910695 + ... + 15912307.

It is an arithmetic number, because the mean of its divisors is an integer number (1642106196).

Almost surely, 2^25665251113 is an apocalyptic number.

It is an amenable number.

25665251113 is a deficient number, since it is larger than the sum of its proper divisors (608448023).

25665251113 is a wasteful number, since it uses less digits than its factorization.

25665251113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904.

The product of its digits is 54000, while the sum is 37.

The spelling of 25665251113 in words is "twenty-five billion, six hundred sixty-five million, two hundred fifty-one thousand, one hundred thirteen".