25409295243 has 24 divisors (see below), whose sum is σ = 38417416128. Its totient is φ = 16781199624.

The previous prime is 25409295181. The next prime is 25409295253. The reversal of 25409295243 is 34259290452.

It is not a de Polignac number, because 25409295243 - 2⁹ = 25409294731 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25409295253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 462621 + ... + 514622.

It is an arithmetic number, because the mean of its divisors is an integer number (1600725672).

Almost surely, 2^25409295243 is an apocalyptic number.

25409295243 is a deficient number, since it is larger than the sum of its proper divisors (13008120885).

25409295243 is an equidigital number, since it uses as much as digits as its factorization.

25409295243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977365 (or 977353 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 25409295243 in words is "twenty-five billion, four hundred nine million, two hundred ninety-five thousand, two hundred forty-three".