25555032499 has 8 divisors (see below), whose sum is σ = 26029615248. Its totient is φ = 25082244960.

The previous prime is 25555032491. The next prime is 25555032511. The reversal of 25555032499 is 99423055552.

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 25555032499 - 2³ = 25555032491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25555032491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 420052 + ... + 477025.

It is an arithmetic number, because the mean of its divisors is an integer number (3253701906).

Almost surely, 2^25555032499 is an apocalyptic number.

25555032499 is a deficient number, since it is larger than the sum of its proper divisors (474582749).

25555032499 is an equidigital number, since it uses as much as digits as its factorization.

25555032499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897605.

The product of its (nonzero) digits is 2430000, while the sum is 49.

The spelling of 25555032499 in words is "twenty-five billion, five hundred fifty-five million, thirty-two thousand, four hundred ninety-nine".