2645843173 has 2 divisors, whose sum is σ = 2645843174. Its totient is φ = 2645843172.

The previous prime is 2645843131. The next prime is 2645843183. The reversal of 2645843173 is 3713485462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1609453924 + 1036389249 = 40118^2 + 32193^2 .

It is a cyclic number.

It is not a de Polignac number, because 2645843173 - 2¹⁷ = 2645712101 is a prime.

It is a super-2 number, since 2×2645843173² = 14000972192221415858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2645843113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1322921586 + 1322921587.

It is an arithmetic number, because the mean of its divisors is an integer number (1322921587).

Almost surely, 2^2645843173 is an apocalyptic number.

It is an amenable number.

2645843173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2645843173 is an equidigital number, since it uses as much as digits as its factorization.

2645843173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 43.

The square root of 2645843173 is about 51437.7601864622. The cubic root of 2645843173 is about 1383.1035612692.

The spelling of 2645843173 in words is "two billion, six hundred forty-five million, eight hundred forty-three thousand, one hundred seventy-three".