25801930321 has 2 divisors, whose sum is σ = 25801930322. Its totient is φ = 25801930320.

The previous prime is 25801930307. The next prime is 25801930369. The reversal of 25801930321 is 12303910852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16265431296 + 9536499025 = 127536^2 + 97655^2 .

It is a cyclic number.

It is not a de Polignac number, because 25801930321 - 2¹³ = 25801922129 is a prime.

It is not a weakly prime, because it can be changed into another prime (25801930381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12900965160 + 12900965161.

It is an arithmetic number, because the mean of its divisors is an integer number (12900965161).

Almost surely, 2^25801930321 is an apocalyptic number.

It is an amenable number.

25801930321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25801930321 is an equidigital number, since it uses as much as digits as its factorization.

25801930321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 25801930321 in words is "twenty-five billion, eight hundred one million, nine hundred thirty thousand, three hundred twenty-one".