24851315449 has 9 divisors (see below), whose sum is σ = 26231281167. Its totient is φ = 23540513904.

The previous prime is 24851315429. The next prime is 24851315453. The reversal of 24851315449 is 94451315842.

The square root of 24851315449 is 157643.

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

It can be written as a sum of positive squares in only one way, i.e., 24659991225 + 191324224 = 157035^2 + 13832^2 .

It is not a de Polignac number, because 24851315449 - 2⁹ = 24851314937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 24851315399 and 24851315408.

It is not an unprimeable number, because it can be changed into a prime (24851315429) 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 8 ways as a sum of consecutive naturals, for example, 2991069 + ... + 2999365.

Almost surely, 2^24851315449 is an apocalyptic number.

24851315449 is the 157643-rd square number.

24851315449 is the 78822-nd centered octagonal number.

It is an amenable number.

24851315449 is a deficient number, since it is larger than the sum of its proper divisors (1379965718).

24851315449 is an frugal number, since it uses more digits than its factorization.

24851315449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16632 (or 8316 counting only the distinct ones).

The product of its digits is 691200, while the sum is 46.

The spelling of 24851315449 in words is "twenty-four billion, eight hundred fifty-one million, three hundred fifteen thousand, four hundred forty-nine".