25308013645 has 8 divisors (see below), whose sum is σ = 32156064504. Its totient is φ = 19055445504.

The previous prime is 25308013631. The next prime is 25308013673. The reversal of 25308013645 is 54631080352.

It can be written as a sum of positive squares in 4 ways, for example, as 2981378404 + 22326635241 = 54602^2 + 149421^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25308013645 - 2⁵ = 25308013613 is a prime.

It is a super-3 number, since 3×25308013645³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148870584 + ... + 148870753.

It is an arithmetic number, because the mean of its divisors is an integer number (4019508063).

Almost surely, 2^25308013645 is an apocalyptic number.

It is an amenable number.

25308013645 is a deficient number, since it is larger than the sum of its proper divisors (6848050859).

25308013645 is a wasteful number, since it uses less digits than its factorization.

25308013645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297741359.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 25308013645 its reverse (54631080352), we get a palindrome (79939093997).

The spelling of 25308013645 in words is "twenty-five billion, three hundred eight million, thirteen thousand, six hundred forty-five".