25725956081 has 16 divisors (see below), whose sum is σ = 30483271680. Its totient is φ = 21245455440.

The previous prime is 25725956071. The next prime is 25725956093. The reversal of 25725956081 is 18065952752.

It is a cyclic number.

It is not a de Polignac number, because 25725956081 - 2¹⁴ = 25725939697 is a prime.

It is a super-2 number, since 2×25725956081² (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 (25725956071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211871 + ... + 310388.

It is an arithmetic number, because the mean of its divisors is an integer number (1905204480).

Almost surely, 2^25725956081 is an apocalyptic number.

It is an amenable number.

25725956081 is a deficient number, since it is larger than the sum of its proper divisors (4757315599).

25725956081 is a wasteful number, since it uses less digits than its factorization.

25725956081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522524.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 25725956081 in words is "twenty-five billion, seven hundred twenty-five million, nine hundred fifty-six thousand, eighty-one".