25506718122 has 16 divisors (see below), whose sum is σ = 51015036672. Its totient is φ = 8501972640.

The previous prime is 25506718117. The next prime is 25506718147. The reversal of 25506718122 is 22181760552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275847 + ... + 356517.

It is an arithmetic number, because the mean of its divisors is an integer number (3188439792).

Almost surely, 2^25506718122 is an apocalyptic number.

25506718122 is an abundant number, since it is smaller than the sum of its proper divisors (25508318550).

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

25506718122 is a wasteful number, since it uses less digits than its factorization.

25506718122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133373.

The product of its (nonzero) digits is 67200, while the sum is 39.

The spelling of 25506718122 in words is "twenty-five billion, five hundred six million, seven hundred eighteen thousand, one hundred twenty-two".