25356527121 has 16 divisors (see below), whose sum is σ = 36456114240. Its totient is φ = 15624046080.

The previous prime is 25356527117. The next prime is 25356527129. The reversal of 25356527121 is 12172565352.

It is not a de Polignac number, because 25356527121 - 2² = 25356527117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25356527121.

It is not an unprimeable number, because it can be changed into a prime (25356527129) 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, 5422680 + ... + 5427353.

It is an arithmetic number, because the mean of its divisors is an integer number (2278507140).

Almost surely, 2^25356527121 is an apocalyptic number.

It is an amenable number.

25356527121 is a deficient number, since it is larger than the sum of its proper divisors (11099587119).

25356527121 is a wasteful number, since it uses less digits than its factorization.

25356527121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10850096.

The product of its digits is 126000, while the sum is 39.

The spelling of 25356527121 in words is "twenty-five billion, three hundred fifty-six million, five hundred twenty-seven thousand, one hundred twenty-one".