25530525249 has 8 divisors (see below), whose sum is σ = 34050527040. Its totient is φ = 17015436816.

The previous prime is 25530525233. The next prime is 25530525257. The reversal of 25530525249 is 94252503552.

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

It is not a de Polignac number, because 25530525249 - 2⁴ = 25530525233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25530525249.

It is not an unprimeable number, because it can be changed into a prime (25530525269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1216197 + ... + 1237010.

It is an arithmetic number, because the mean of its divisors is an integer number (4256315880).

Almost surely, 2^25530525249 is an apocalyptic number.

It is an amenable number.

25530525249 is a deficient number, since it is larger than the sum of its proper divisors (8520001791).

25530525249 is a wasteful number, since it uses less digits than its factorization.

25530525249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2456679.

The product of its (nonzero) digits is 540000, while the sum is 42.

The spelling of 25530525249 in words is "twenty-five billion, five hundred thirty million, five hundred twenty-five thousand, two hundred forty-nine".