25111212625 has 16 divisors (see below), whose sum is σ = 31343347152. Its totient is φ = 20086051200.

The previous prime is 25111212613. The next prime is 25111212631. The reversal of 25111212625 is 52621211152.

It can be written as a sum of positive squares in 8 ways, for example, as 9291610449 + 15819602176 = 96393^2 + 125776^2 .

It is not a de Polignac number, because 25111212625 - 2¹⁵ = 25111179857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25111212593 and 25111212602.

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 15 ways as a sum of consecutive naturals, for example, 1380087 + ... + 1398163.

It is an arithmetic number, because the mean of its divisors is an integer number (1958959197).

Almost surely, 2^25111212625 is an apocalyptic number.

25111212625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25111212625 is a deficient number, since it is larger than the sum of its proper divisors (6232134527).

25111212625 is a wasteful number, since it uses less digits than its factorization.

25111212625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29205 (or 29195 counting only the distinct ones).

The product of its digits is 2400, while the sum is 28.

Adding to 25111212625 its reverse (52621211152), we get a palindrome (77732423777).

The spelling of 25111212625 in words is "twenty-five billion, one hundred eleven million, two hundred twelve thousand, six hundred twenty-five".