25815278110081 has 8 divisors (see below), whose sum is σ = 27179010216000. Its totient is φ = 24452049330000.

The previous prime is 25815278110003. The next prime is 25815278110099. The reversal of 25815278110081 is 18001187251852.

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

It is a cyclic number.

It is not a de Polignac number, because 25815278110081 - 2¹³ = 25815278101889 is a prime.

It is a super-2 number, since 2×25815278110081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25815278110981) 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, 125726170 + ... + 125931331.

It is an arithmetic number, because the mean of its divisors is an integer number (3397376277000).

Almost surely, 2^{25815278110081} is an apocalyptic number.

It is an amenable number.

25815278110081 is a deficient number, since it is larger than the sum of its proper divisors (1363732105919).

25815278110081 is a wasteful number, since it uses less digits than its factorization.

25815278110081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251662919.

The product of its (nonzero) digits is 358400, while the sum is 49.

The spelling of 25815278110081 in words is "twenty-five trillion, eight hundred fifteen billion, two hundred seventy-eight million, one hundred ten thousand, eighty-one".