24993649889 has 4 divisors (see below), whose sum is σ = 26916238356. Its totient is φ = 23071061424.

The previous prime is 24993649873. The next prime is 24993649907. The reversal of 24993649889 is 98894639942.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7172734864 + 17820915025 = 84692^2 + 133495^2 .

It is a cyclic number.

It is not a de Polignac number, because 24993649889 - 2⁴ = 24993649873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24993649819) 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 3 ways as a sum of consecutive naturals, for example, 961294214 + ... + 961294239.

It is an arithmetic number, because the mean of its divisors is an integer number (6729059589).

Almost surely, 2^24993649889 is an apocalyptic number.

It is an amenable number.

24993649889 is a deficient number, since it is larger than the sum of its proper divisors (1922588467).

24993649889 is a wasteful number, since it uses less digits than its factorization.

24993649889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922588466.

The product of its digits is 241864704, while the sum is 71.

The spelling of 24993649889 in words is "twenty-four billion, nine hundred ninety-three million, six hundred forty-nine thousand, eight hundred eighty-nine".