1808113680 has 60 divisors (see below), whose sum is σ = 6072250860. Its totient is φ = 482163456.

The previous prime is 1808113679. The next prime is 1808113711. The reversal of 1808113680 is 863118081.

It can be written as a sum of positive squares in 2 ways, for example, as 493906176 + 1314207504 = 22224^2 + 36252^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1254915 + ... + 1256354.

It is an arithmetic number, because the mean of its divisors is an integer number (101204181).

Almost surely, 2^1808113680 is an apocalyptic number.

1808113680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1808113680 is an abundant number, since it is smaller than the sum of its proper divisors (4264137180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1808113680 is a wasteful number, since it uses less digits than its factorization.

1808113680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511288 (or 2511279 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1808113680 is about 42521.9199942806. The cubic root of 1808113680 is about 1218.2654019753.

The spelling of 1808113680 in words is "one billion, eight hundred eight million, one hundred thirteen thousand, six hundred eighty".