245042445643 has 4 divisors (see below), whose sum is σ = 245076922080. Its totient is φ = 245007969208.

The previous prime is 245042445601. The next prime is 245042445647. The reversal of 245042445643 is 346544240542.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245042445643 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245042445643.

It is not an unprimeable number, because it can be changed into a prime (245042445647) 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, 17227555 + ... + 17241772.

It is an arithmetic number, because the mean of its divisors is an integer number (61269230520).

Almost surely, 2^245042445643 is an apocalyptic number.

245042445643 is a deficient number, since it is larger than the sum of its proper divisors (34476437).

245042445643 is an equidigital number, since it uses as much as digits as its factorization.

245042445643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34476436.

The product of its (nonzero) digits is 1843200, while the sum is 43.

The spelling of 245042445643 in words is "two hundred forty-five billion, forty-two million, four hundred forty-five thousand, six hundred forty-three".