25550641625 has 8 divisors (see below), whose sum is σ = 31887200904. Its totient is φ = 20440513200.

The previous prime is 25550641619. The next prime is 25550641637. The reversal of 25550641625 is 52614605552.

It can be written as a sum of positive squares in 4 ways, for example, as 537289 + 25550104336 = 733^2 + 159844^2 .

It is not a de Polignac number, because 25550641625 - 2¹⁰ = 25550640601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102202442 + ... + 102202691.

It is an arithmetic number, because the mean of its divisors is an integer number (3985900113).

Almost surely, 2^25550641625 is an apocalyptic number.

25550641625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25550641625 is a deficient number, since it is larger than the sum of its proper divisors (6336559279).

25550641625 is an equidigital number, since it uses as much as digits as its factorization.

25550641625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204405148 (or 204405138 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 25550641625 in words is "twenty-five billion, five hundred fifty million, six hundred forty-one thousand, six hundred twenty-five".