2549643845 has 8 divisors (see below), whose sum is σ = 3496654464. Its totient is φ = 1748327184.

The previous prime is 2549643823. The next prime is 2549643847. The reversal of 2549643845 is 5483469452.

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 2549643845 - 2²⁴ = 2532866629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2549643793 and 2549643802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2549643847) 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, 36423449 + ... + 36423518.

It is an arithmetic number, because the mean of its divisors is an integer number (437081808).

Almost surely, 2^2549643845 is an apocalyptic number.

It is an amenable number.

2549643845 is a deficient number, since it is larger than the sum of its proper divisors (947010619).

2549643845 is an equidigital number, since it uses as much as digits as its factorization.

2549643845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72846979.

The product of its digits is 4147200, while the sum is 50.

The square root of 2549643845 is about 50493.9981086861. The cubic root of 2549643845 is about 1366.1336001228.

The spelling of 2549643845 in words is "two billion, five hundred forty-nine million, six hundred forty-three thousand, eight hundred forty-five".