25121153118 has 48 divisors (see below), whose sum is σ = 52647366528. Its totient is φ = 7989332400.

The previous prime is 25121153117. The next prime is 25121153137. The reversal of 25121153118 is 81135112152.

It is a super-2 number, since 2×25121153118² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25121153117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 378705 + ... + 440067.

It is an arithmetic number, because the mean of its divisors is an integer number (1096820136).

Almost surely, 2^25121153118 is an apocalyptic number.

25121153118 is an abundant number, since it is smaller than the sum of its proper divisors (27526213410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25121153118 is a wasteful number, since it uses less digits than its factorization.

25121153118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61501 (or 61470 counting only the distinct ones).

The product of its digits is 2400, while the sum is 30.

The spelling of 25121153118 in words is "twenty-five billion, one hundred twenty-one million, one hundred fifty-three thousand, one hundred eighteen".