25235404801 has 4 divisors (see below), whose sum is σ = 25235858772. Its totient is φ = 25234950832.

The previous prime is 25235404787. The next prime is 25235404823. The reversal of 25235404801 is 10840453252.

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 12919732225 + 12315672576 = 113665^2 + 110976^2 .

It is a cyclic number.

It is not a de Polignac number, because 25235404801 - 2⁹ = 25235404289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25235404301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129706 + ... + 259411.

It is an arithmetic number, because the mean of its divisors is an integer number (6308964693).

Almost surely, 2^25235404801 is an apocalyptic number.

25235404801 is the 129706-th pentagonal number.

It is an amenable number.

25235404801 is a deficient number, since it is larger than the sum of its proper divisors (453971).

25235404801 is an equidigital number, since it uses as much as digits as its factorization.

25235404801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453970.

The product of its (nonzero) digits is 38400, while the sum is 34.

The spelling of 25235404801 in words is "twenty-five billion, two hundred thirty-five million, four hundred four thousand, eight hundred one".