1672806445 has 24 divisors (see below), whose sum is σ = 2155279896. Its totient is φ = 1245391488.

The previous prime is 1672806433. The next prime is 1672806497. The reversal of 1672806445 is 5446082761.

It can be written as a sum of positive squares in 4 ways, for example, as 493639524 + 1179166921 = 22218^2 + 34339^2 .

It is not a de Polignac number, because 1672806445 - 2²⁷ = 1538588717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89319 + ... + 106411.

It is an arithmetic number, because the mean of its divisors is an integer number (89803329).

Almost surely, 2^1672806445 is an apocalyptic number.

It is an amenable number.

1672806445 is a deficient number, since it is larger than the sum of its proper divisors (482473451).

1672806445 is a wasteful number, since it uses less digits than its factorization.

1672806445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17181 (or 17158 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 1672806445 is about 40899.9565403192. The cubic root of 1672806445 is about 1187.0852197926.

The spelling of 1672806445 in words is "one billion, six hundred seventy-two million, eight hundred six thousand, four hundred forty-five".