25013431506 has 48 divisors (see below), whose sum is σ = 58261024224. Its totient is φ = 7138526976.

The previous prime is 25013431489. The next prime is 25013431511. The reversal of 25013431506 is 60513431052.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 211426 + ... + 307778.

It is an arithmetic number, because the mean of its divisors is an integer number (1213771338).

Almost surely, 2^25013431506 is an apocalyptic number.

25013431506 is an abundant number, since it is smaller than the sum of its proper divisors (33247592718).

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

25013431506 is a wasteful number, since it uses less digits than its factorization.

25013431506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97255 (or 97248 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 25013431506 its reverse (60513431052), we get a palindrome (85526862558).

The spelling of 25013431506 in words is "twenty-five billion, thirteen million, four hundred thirty-one thousand, five hundred six".