25801051321 has 4 divisors (see below), whose sum is σ = 25804026000. Its totient is φ = 25798076644.

The previous prime is 25801051279. The next prime is 25801051327. The reversal of 25801051321 is 12315010852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25801051321 - 2¹⁵ = 25801018553 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25801051321.

It is not an unprimeable number, because it can be changed into a prime (25801051327) 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 3 ways as a sum of consecutive naturals, for example, 1474291 + ... + 1491688.

It is an arithmetic number, because the mean of its divisors is an integer number (6451006500).

Almost surely, 2^25801051321 is an apocalyptic number.

It is an amenable number.

25801051321 is a deficient number, since it is larger than the sum of its proper divisors (2974679).

25801051321 is an equidigital number, since it uses as much as digits as its factorization.

25801051321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2974678.

The product of its (nonzero) digits is 2400, while the sum is 28.

The spelling of 25801051321 in words is "twenty-five billion, eight hundred one million, fifty-one thousand, three hundred twenty-one".