25397456984523 has 24 divisors (see below), whose sum is σ = 40048349231072. Its totient is φ = 15415105603968.

The previous prime is 25397456984507. The next prime is 25397456984527. The reversal of 25397456984523 is 32548965479352.

25397456984523 is a `hidden beast` number, since 2 + 5 + 3 + 9 + 7 + 4 + 5 + 6 + 98 + 4 + 523 = 666.

It is not a de Polignac number, because 25397456984523 - 2⁴ = 25397456984507 is a prime.

It is a super-2 number, since 2×25397456984523² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25397456984527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1486787911 + ... + 1486804992.

Almost surely, 2^{25397456984523} is an apocalyptic number.

25397456984523 is a deficient number, since it is larger than the sum of its proper divisors (14650892246549).

25397456984523 is a wasteful number, since it uses less digits than its factorization.

25397456984523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2973592995 (or 2973592992 counting only the distinct ones).

The product of its digits is 1959552000, while the sum is 72.

The spelling of 25397456984523 in words is "twenty-five trillion, three hundred ninety-seven billion, four hundred fifty-six million, nine hundred eighty-four thousand, five hundred twenty-three".