2445633721 has 8 divisors (see below), whose sum is σ = 2487873600. Its totient is φ = 2403420240.

The previous prime is 2445633571. The next prime is 2445633727. The reversal of 2445633721 is 1273365442.

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 2445633721 - 2¹³ = 2445625529 is a prime.

It is a super-2 number, since 2×2445633721² = 11962248594584611682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2445633727) 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, 306460 + ... + 314338.

It is an arithmetic number, because the mean of its divisors is an integer number (310984200).

Almost surely, 2^2445633721 is an apocalyptic number.

It is an amenable number.

2445633721 is a deficient number, since it is larger than the sum of its proper divisors (42239879).

2445633721 is an equidigital number, since it uses as much as digits as its factorization.

2445633721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13199.

The product of its digits is 120960, while the sum is 37.

The square root of 2445633721 is about 49453.3489361438. The cubic root of 2445633721 is about 1347.2984329099.

The spelling of 2445633721 in words is "two billion, four hundred forty-five million, six hundred thirty-three thousand, seven hundred twenty-one".