24993396649 has 9 divisors (see below), whose sum is σ = 27066081189. Its totient is φ = 23068930560.

The previous prime is 24993396643. The next prime is 24993396677. The reversal of 24993396649 is 94669339942.

The square root of 24993396649 is 158093.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 9650115225 + 15343281424 = 98235^2 + 123868^2 .

It is not a de Polignac number, because 24993396649 - 2²⁷ = 24859178921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (24993396643) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2049129 + ... + 2061289.

Almost surely, 2^24993396649 is an apocalyptic number.

24993396649 is the 158093-rd square number.

24993396649 is the 79047-th centered octagonal number.

It is an amenable number.

24993396649 is a deficient number, since it is larger than the sum of its proper divisors (2072684540).

24993396649 is an frugal number, since it uses more digits than its factorization.

24993396649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24348 (or 12174 counting only the distinct ones).

The product of its digits is 68024448, while the sum is 64.

Multiplying 24993396649 by its sum of digits (64), we get a square (1599577385536 = 1264744²).

The spelling of 24993396649 in words is "twenty-four billion, nine hundred ninety-three million, three hundred ninety-six thousand, six hundred forty-nine".