25531093873 has 4 divisors (see below), whose sum is σ = 25537039780. Its totient is φ = 25525147968.

The previous prime is 25531093849. The next prime is 25531093919. The reversal of 25531093873 is 37839013552.

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 10089800704 + 15441293169 = 100448^2 + 124263^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25531093873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25531093823) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2966508 + ... + 2975101.

It is an arithmetic number, because the mean of its divisors is an integer number (6384259945).

Almost surely, 2^25531093873 is an apocalyptic number.

It is an amenable number.

25531093873 is a deficient number, since it is larger than the sum of its proper divisors (5945907).

25531093873 is an equidigital number, since it uses as much as digits as its factorization.

25531093873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5945906.

The product of its (nonzero) digits is 680400, while the sum is 46.

The spelling of 25531093873 in words is "twenty-five billion, five hundred thirty-one million, ninety-three thousand, eight hundred seventy-three".