25502253345 has 72 divisors (see below), whose sum is σ = 45490286400. Its totient is φ = 13215873600.

The previous prime is 25502253317. The next prime is 25502253377. The reversal of 25502253345 is 54335220552.

25502253345 is a `hidden beast` number, since 2 + 550 + 22 + 53 + 34 + 5 = 666.

It is not a de Polignac number, because 25502253345 - 2⁵ = 25502253313 is a prime.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 15009306 + ... + 15011004.

Almost surely, 2^25502253345 is an apocalyptic number.

It is an amenable number.

25502253345 is a deficient number, since it is larger than the sum of its proper divisors (19988033055).

25502253345 is a wasteful number, since it uses less digits than its factorization.

25502253345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955 (or 1905 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 36.

Adding to 25502253345 its reverse (54335220552), we get a palindrome (79837473897).

The spelling of 25502253345 in words is "twenty-five billion, five hundred two million, two hundred fifty-three thousand, three hundred forty-five".