25551815195 has 16 divisors (see below), whose sum is σ = 30736480320. Its totient is φ = 20391984000.

The previous prime is 25551815153. The next prime is 25551815227. The reversal of 25551815195 is 59151815552.

It is not a de Polignac number, because 25551815195 - 2¹² = 25551811099 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3897170 + ... + 3903720.

It is an arithmetic number, because the mean of its divisors is an integer number (1921030020).

Almost surely, 2^25551815195 is an apocalyptic number.

25551815195 is a deficient number, since it is larger than the sum of its proper divisors (5184665125).

25551815195 is an equidigital number, since it uses as much as digits as its factorization.

25551815195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8326.

The product of its digits is 450000, while the sum is 47.

The spelling of 25551815195 in words is "twenty-five billion, five hundred fifty-one million, eight hundred fifteen thousand, one hundred ninety-five".