25253451305 has 16 divisors (see below), whose sum is σ = 30928825488. Its totient is φ = 19789056000.

The previous prime is 25253451299. The next prime is 25253451331. The reversal of 25253451305 is 50315435252.

It can be written as a sum of positive squares in 8 ways, for example, as 347561449 + 24905889856 = 18643^2 + 157816^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25253451305 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98276 + ... + 245285.

It is an arithmetic number, because the mean of its divisors is an integer number (1933051593).

Almost surely, 2^25253451305 is an apocalyptic number.

It is an amenable number.

25253451305 is a deficient number, since it is larger than the sum of its proper divisors (5675374183).

25253451305 is a wasteful number, since it uses less digits than its factorization.

25253451305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343868.

The product of its (nonzero) digits is 90000, while the sum is 35.

Adding to 25253451305 its reverse (50315435252), we get a palindrome (75568886557).

The spelling of 25253451305 in words is "twenty-five billion, two hundred fifty-three million, four hundred fifty-one thousand, three hundred five".