25730985653523 has 64 divisors (see below), whose sum is σ = 40805969203200. Its totient is φ = 15976165870080.

The previous prime is 25730985653491. The next prime is 25730985653543. The reversal of 25730985653523 is 32535658903752.

It is a happy number.

25730985653523 is a `hidden beast` number, since 2 + 5 + 7 + 3 + 0 + 9 + 8 + 56 + 53 + 523 = 666.

It is not a de Polignac number, because 25730985653523 - 2⁵ = 25730985653491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25730985653543) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58392286 + ... + 58831292.

It is an arithmetic number, because the mean of its divisors is an integer number (637593268800).

Almost surely, 2^{25730985653523} is an apocalyptic number.

25730985653523 is a deficient number, since it is larger than the sum of its proper divisors (15074983549677).

25730985653523 is a wasteful number, since it uses less digits than its factorization.

25730985653523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440969 (or 440963 counting only the distinct ones).

The product of its (nonzero) digits is 204120000, while the sum is 63.

The spelling of 25730985653523 in words is "twenty-five trillion, seven hundred thirty billion, nine hundred eighty-five million, six hundred fifty-three thousand, five hundred twenty-three".