25852816901 has 4 divisors (see below), whose sum is σ = 25899231852. Its totient is φ = 25806401952.

The previous prime is 25852816879. The next prime is 25852816903. The reversal of 25852816901 is 10961825852.

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 9672722500 + 16180094401 = 98350^2 + 127201^2 .

It is a cyclic number.

It is not a de Polignac number, because 25852816901 - 2¹⁸ = 25852554757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25852816903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23206640 + ... + 23207753.

It is an arithmetic number, because the mean of its divisors is an integer number (6474807963).

Almost surely, 2^25852816901 is an apocalyptic number.

It is an amenable number.

25852816901 is a deficient number, since it is larger than the sum of its proper divisors (46414951).

25852816901 is an equidigital number, since it uses as much as digits as its factorization.

25852816901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46414950.

The product of its (nonzero) digits is 345600, while the sum is 47.

The spelling of 25852816901 in words is "twenty-five billion, eight hundred fifty-two million, eight hundred sixteen thousand, nine hundred one".