2256380749 has 4 divisors (see below), whose sum is σ = 2578720864. Its totient is φ = 1934040636.

The previous prime is 2256380689. The next prime is 2256380759. The reversal of 2256380749 is 9470836522.

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 2256380749 - 2¹¹ = 2256378701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2256380699 and 2256380708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2256380759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161170047 + ... + 161170060.

It is an arithmetic number, because the mean of its divisors is an integer number (644680216).

Almost surely, 2^2256380749 is an apocalyptic number.

It is an amenable number.

2256380749 is a deficient number, since it is larger than the sum of its proper divisors (322340115).

2256380749 is an equidigital number, since it uses as much as digits as its factorization.

2256380749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322340114.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 2256380749 is about 47501.3762853246. The cubic root of 2256380749 is about 1311.6082163910.

The spelling of 2256380749 in words is "two billion, two hundred fifty-six million, three hundred eighty thousand, seven hundred forty-nine".