25644795043 has 16 divisors (see below), whose sum is σ = 30397204480. Its totient is φ = 21171326400.

The previous prime is 25644795013. The next prime is 25644795089. The reversal of 25644795043 is 34059744652.

It is not a de Polignac number, because 25644795043 - 2²¹ = 25642697891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25644795013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234258 + ... + 325831.

It is an arithmetic number, because the mean of its divisors is an integer number (1899825280).

Almost surely, 2^25644795043 is an apocalyptic number.

25644795043 is a deficient number, since it is larger than the sum of its proper divisors (4752409437).

25644795043 is a wasteful number, since it uses less digits than its factorization.

25644795043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560338.

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 25644795043 in words is "twenty-five billion, six hundred forty-four million, seven hundred ninety-five thousand, forty-three".