25172497090 has 16 divisors (see below), whose sum is σ = 48795917688. Its totient is φ = 9294460416.

The previous prime is 25172497079. The next prime is 25172497109. The reversal of 25172497090 is 9079427152.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11651691249 + 13520805841 = 107943^2 + 116279^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25172497090.

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, 96817167 + ... + 96817426.

Almost surely, 2^25172497090 is an apocalyptic number.

25172497090 is a deficient number, since it is larger than the sum of its proper divisors (23623420598).

25172497090 is a wasteful number, since it uses less digits than its factorization.

25172497090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193634613.

The product of its (nonzero) digits is 317520, while the sum is 46.

The spelling of 25172497090 in words is "twenty-five billion, one hundred seventy-two million, four hundred ninety-seven thousand, ninety".