25131320006 has 32 divisors (see below), whose sum is σ = 41050588320. Its totient is φ = 11469878784.

The previous prime is 25131319907. The next prime is 25131320009. The reversal of 25131320006 is 60002313152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25131320009) 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, 1291880 + ... + 1311188.

It is an arithmetic number, because the mean of its divisors is an integer number (1282830885).

Almost surely, 2^25131320006 is an apocalyptic number.

25131320006 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25131320006 is a deficient number, since it is larger than the sum of its proper divisors (15919268314).

25131320006 is a wasteful number, since it uses less digits than its factorization.

25131320006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19880.

The product of its (nonzero) digits is 1080, while the sum is 23.

Adding to 25131320006 its reverse (60002313152), we get a palindrome (85133633158).

The spelling of 25131320006 in words is "twenty-five billion, one hundred thirty-one million, three hundred twenty thousand, six".