25633407197 has 4 divisors (see below), whose sum is σ = 26517317820. Its totient is φ = 24749496576.

The previous prime is 25633407161. The next prime is 25633407223. The reversal of 25633407197 is 79170433652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19647909241 + 5985497956 = 140171^2 + 77366^2 .

It is a cyclic number.

It is not a de Polignac number, because 25633407197 - 2¹⁰ = 25633406173 is a prime.

It is a super-2 number, since 2×25633407197² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25633407797) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 441955268 + ... + 441955325.

It is an arithmetic number, because the mean of its divisors is an integer number (6629329455).

Almost surely, 2^25633407197 is an apocalyptic number.

It is an amenable number.

25633407197 is a deficient number, since it is larger than the sum of its proper divisors (883910623).

25633407197 is an equidigital number, since it uses as much as digits as its factorization.

25633407197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883910622.

The product of its (nonzero) digits is 952560, while the sum is 47.

The spelling of 25633407197 in words is "twenty-five billion, six hundred thirty-three million, four hundred seven thousand, one hundred ninety-seven".