25268845309 has 4 divisors (see below), whose sum is σ = 25269201504. Its totient is φ = 25268489116.

The previous prime is 25268845307. The next prime is 25268845361. The reversal of 25268845309 is 90354886252.

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 25268845309 - 2¹ = 25268845307 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 (25268845307) 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, 31417 + ... + 226990.

It is an arithmetic number, because the mean of its divisors is an integer number (6317300376).

Almost surely, 2^25268845309 is an apocalyptic number.

It is an amenable number.

25268845309 is a deficient number, since it is larger than the sum of its proper divisors (356195).

25268845309 is an equidigital number, since it uses as much as digits as its factorization.

25268845309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356194.

The product of its (nonzero) digits is 4147200, while the sum is 52.

The spelling of 25268845309 in words is "twenty-five billion, two hundred sixty-eight million, eight hundred forty-five thousand, three hundred nine".