25447698125 has 20 divisors (see below), whose sum is σ = 32658917676. Its totient is φ = 19807920000.

The previous prime is 25447698113. The next prime is 25447698131. The reversal of 25447698125 is 52189674452.

It can be written as a sum of positive squares in 10 ways, for example, as 18579598249 + 6868099876 = 136307^2 + 82874^2 .

It is not a de Polignac number, because 25447698125 - 2¹² = 25447694029 is a prime.

It is a super-2 number, since 2×25447698125² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 527096 + ... + 573345.

Almost surely, 2^25447698125 is an apocalyptic number.

25447698125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25447698125 is a deficient number, since it is larger than the sum of its proper divisors (7211219551).

25447698125 is an equidigital number, since it uses as much as digits as its factorization.

25447698125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100498 (or 1100483 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 53.

The spelling of 25447698125 in words is "twenty-five billion, four hundred forty-seven million, six hundred ninety-eight thousand, one hundred twenty-five".