25512603121 has 8 divisors (see below), whose sum is σ = 26178920064. Its totient is φ = 24851431920.

The previous prime is 25512603089. The next prime is 25512603301. The reversal of 25512603121 is 12130621552.

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 25512603121 - 2⁵ = 25512603089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25512603121.

It is not an unprimeable number, because it can be changed into a prime (25512606121) 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, 1276390 + ... + 1296223.

It is an arithmetic number, because the mean of its divisors is an integer number (3272365008).

Almost surely, 2^25512603121 is an apocalyptic number.

It is an amenable number.

25512603121 is a deficient number, since it is larger than the sum of its proper divisors (666316943).

25512603121 is a wasteful number, since it uses less digits than its factorization.

25512603121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2572871.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 25512603121 in words is "twenty-five billion, five hundred twelve million, six hundred three thousand, one hundred twenty-one".