25315884025 has 6 divisors (see below), whose sum is σ = 31391696222. Its totient is φ = 20252707200.

The previous prime is 25315884019. The next prime is 25315884047. The reversal of 25315884025 is 52048851352.

It can be written as a sum of positive squares in 3 ways, for example, as 153041641 + 25162842384 = 12371^2 + 158628^2 .

It is not a de Polignac number, because 25315884025 - 2²¹ = 25313786873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 506317656 + ... + 506317705.

Almost surely, 2^25315884025 is an apocalyptic number.

25315884025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25315884025 is a deficient number, since it is larger than the sum of its proper divisors (6075812197).

25315884025 is a wasteful number, since it uses less digits than its factorization.

25315884025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012635371 (or 1012635366 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 43.

The spelling of 25315884025 in words is "twenty-five billion, three hundred fifteen million, eight hundred eighty-four thousand, twenty-five".