25072394481 has 16 divisors (see below), whose sum is σ = 37698683200. Its totient is φ = 16465451904.

The previous prime is 25072394467. The next prime is 25072394513. The reversal of 25072394481 is 18449327052.

25072394481 is a `hidden beast` number, since 2 + 507 + 23 + 9 + 44 + 81 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-25072394481 is a prime.

It is a super-2 number, since 2×25072394481² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25072394441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6928096 + ... + 6931713.

It is an arithmetic number, because the mean of its divisors is an integer number (2356167700).

Almost surely, 2^25072394481 is an apocalyptic number.

It is an amenable number.

25072394481 is a deficient number, since it is larger than the sum of its proper divisors (12626288719).

25072394481 is a wasteful number, since it uses less digits than its factorization.

25072394481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13859885 (or 13859879 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 25072394481 in words is "twenty-five billion, seventy-two million, three hundred ninety-four thousand, four hundred eighty-one".