2445779257 has 4 divisors (see below), whose sum is σ = 2458584576. Its totient is φ = 2432973940.

The previous prime is 2445779227. The next prime is 2445779263. The reversal of 2445779257 is 7529775442.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2445779257 - 2¹⁵ = 2445746489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2445779227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6402373 + ... + 6402754.

It is an arithmetic number, because the mean of its divisors is an integer number (614646144).

Almost surely, 2^2445779257 is an apocalyptic number.

It is an amenable number.

2445779257 is a deficient number, since it is larger than the sum of its proper divisors (12805319).

2445779257 is a wasteful number, since it uses less digits than its factorization.

2445779257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12805318.

The product of its digits is 4939200, while the sum is 52.

The square root of 2445779257 is about 49454.8203616189. The cubic root of 2445779257 is about 1347.3251576171.

The spelling of 2445779257 in words is "two billion, four hundred forty-five million, seven hundred seventy-nine thousand, two hundred fifty-seven".