25485646525 has 12 divisors (see below), whose sum is σ = 31829560000. Its totient is φ = 20241834480.

The previous prime is 25485646477. The next prime is 25485646567. The reversal of 25485646525 is 52564658452.

It is not a de Polignac number, because 25485646525 - 2²¹ = 25483549373 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3663525 + ... + 3670474.

Almost surely, 2^25485646525 is an apocalyptic number.

25485646525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25485646525 is a deficient number, since it is larger than the sum of its proper divisors (6343913475).

25485646525 is a wasteful number, since it uses less digits than its factorization.

25485646525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7334148 (or 7334143 counting only the distinct ones).

The product of its digits is 11520000, while the sum is 52.

The spelling of 25485646525 in words is "twenty-five billion, four hundred eighty-five million, six hundred forty-six thousand, five hundred twenty-five".