1845573873361 has 27 divisors (see below), whose sum is σ = 1966773046761. Its totient is φ = 1731590053704.

The previous prime is 1845573873349. The next prime is 1845573873373. The reversal of 1845573873361 is 1633783755481.

The square root of 1845573873361 is 1358519.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (1845573873349) and next prime (1845573873373).

It is not a de Polignac number, because 1845573873361 - 2²³ = 1845565484753 is a prime.

It is a super-2 number, since 2×1845573873361² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1845573873361.

It is not an unprimeable number, because it can be changed into a prime (1845573876361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3278106066 + ... + 3278106628.

Almost surely, 2^{1845573873361} is an apocalyptic number.

1845573873361 is the 1358519-th square number.

1845573873361 is the 679260-th centered octagonal number.

It is an amenable number.

1845573873361 is a deficient number, since it is larger than the sum of its proper divisors (121199173400).

1845573873361 is an frugal number, since it uses more digits than its factorization.

1845573873361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418 (or 709 counting only the distinct ones).

The product of its digits is 50803200, while the sum is 61.

The spelling of 1845573873361 in words is "one trillion, eight hundred forty-five billion, five hundred seventy-three million, eight hundred seventy-three thousand, three hundred sixty-one".