25117252706 has 64 divisors (see below), whose sum is σ = 47500992000. Its totient is φ = 9897789888.

The previous prime is 25117252691. The next prime is 25117252709. The reversal of 25117252706 is 60725271152.

It is a self number, because there is not a number n which added to its sum of digits gives 25117252706.

It is not an unprimeable number, because it can be changed into a prime (25117252709) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2340080 + ... + 2350788.

It is an arithmetic number, because the mean of its divisors is an integer number (742203000).

Almost surely, 2^25117252706 is an apocalyptic number.

25117252706 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

25117252706 is a deficient number, since it is larger than the sum of its proper divisors (22383739294).

25117252706 is a wasteful number, since it uses less digits than its factorization.

25117252706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11008 (or 10994 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 38.

The spelling of 25117252706 in words is "twenty-five billion, one hundred seventeen million, two hundred fifty-two thousand, seven hundred six".