25142899518 has 72 divisors (see below), whose sum is σ = 60316676784. Its totient is φ = 7563357120.

The previous prime is 25142899511. The next prime is 25142899531. The reversal of 25142899518 is 81599824152.

25142899518 is a `hidden beast` number, since 2 + 5 + 1 + 42 + 89 + 9 + 518 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25142899511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 256255 + ... + 340517.

It is an arithmetic number, because the mean of its divisors is an integer number (837731622).

Almost surely, 2^25142899518 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25142899518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30158338392).

25142899518 is an abundant number, since it is smaller than the sum of its proper divisors (35173777266).

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

25142899518 is a wasteful number, since it uses less digits than its factorization.

25142899518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84430 (or 84416 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 54.

The spelling of 25142899518 in words is "twenty-five billion, one hundred forty-two million, eight hundred ninety-nine thousand, five hundred eighteen".