25170669720 has 96 divisors (see below), whose sum is σ = 93491068320. Its totient is φ = 5753295360.

The previous prime is 25170669707. The next prime is 25170669721. The reversal of 25170669720 is 2796607152.

25170669720 is a `hidden beast` number, since 2 + 517 + 0 + 6 + 69 + 72 + 0 = 666.

It is a super-2 number, since 2×25170669720² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25170669721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4991661 + ... + 4996700.

It is an arithmetic number, because the mean of its divisors is an integer number (973865295).

Almost surely, 2^25170669720 is an apocalyptic number.

25170669720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25170669720 is an abundant number, since it is smaller than the sum of its proper divisors (68320398600).

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

25170669720 is a wasteful number, since it uses less digits than its factorization.

25170669720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9988385 (or 9988378 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The spelling of 25170669720 in words is "twenty-five billion, one hundred seventy million, six hundred sixty-nine thousand, seven hundred twenty".