1808072045 has 16 divisors (see below), whose sum is σ = 2346382080. Its totient is φ = 1329593664.

The previous prime is 1808072023. The next prime is 1808072047. The reversal of 1808072045 is 5402708081.

It is a cyclic number.

It is not a de Polignac number, because 1808072045 - 2¹⁰ = 1808071021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1808071996 and 1808072014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1808072047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42659 + ... + 73728.

It is an arithmetic number, because the mean of its divisors is an integer number (146648880).

Almost surely, 2^1808072045 is an apocalyptic number.

It is an amenable number.

1808072045 is a deficient number, since it is larger than the sum of its proper divisors (538310035).

1808072045 is a wasteful number, since it uses less digits than its factorization.

1808072045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116644.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 1808072045 is about 42521.4304204362. The cubic root of 1808072045 is about 1218.2560510018.

The spelling of 1808072045 in words is "one billion, eight hundred eight million, seventy-two thousand, forty-five".