2245123643 has 4 divisors (see below), whose sum is σ = 2565855600. Its totient is φ = 1924391688.

The previous prime is 2245123613. The next prime is 2245123669. The reversal of 2245123643 is 3463215422.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2245123643 - 2¹⁰ = 2245122619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2245123603) 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, 160365968 + ... + 160365981.

It is an arithmetic number, because the mean of its divisors is an integer number (641463900).

Almost surely, 2^2245123643 is an apocalyptic number.

2245123643 is a deficient number, since it is larger than the sum of its proper divisors (320731957).

2245123643 is an equidigital number, since it uses as much as digits as its factorization.

2245123643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320731956.

The product of its digits is 34560, while the sum is 32.

The square root of 2245123643 is about 47382.7357061620. The cubic root of 2245123643 is about 1309.4233701336.

The spelling of 2245123643 in words is "two billion, two hundred forty-five million, one hundred twenty-three thousand, six hundred forty-three".