1808869481 has 8 divisors (see below), whose sum is σ = 1816473120. Its totient is φ = 1801277568.

The previous prime is 1808869471. The next prime is 1808869493. The reversal of 1808869481 is 1849688081.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1808869481 is a prime.

It is a super-2 number, since 2×1808869481² = 6544017598586418722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1808869421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436025 + ... + 440153.

It is an arithmetic number, because the mean of its divisors is an integer number (227059140).

Almost surely, 2^1808869481 is an apocalyptic number.

It is an amenable number.

1808869481 is a deficient number, since it is larger than the sum of its proper divisors (7603639).

1808869481 is a wasteful number, since it uses less digits than its factorization.

1808869481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5863.

The product of its (nonzero) digits is 884736, while the sum is 53.

The square root of 1808869481 is about 42530.8062585228. The cubic root of 1808869481 is about 1218.4351254380.

The spelling of 1808869481 in words is "one billion, eight hundred eight million, eight hundred sixty-nine thousand, four hundred eighty-one".