1868320481 has 8 divisors (see below), whose sum is σ = 1879215144. Its totient is φ = 1857438720.

The previous prime is 1868320411. The next prime is 1868320499. The reversal of 1868320481 is 1840238681.

It can be written as a sum of positive squares in 4 ways, for example, as 88830625 + 1779489856 = 9425^2 + 42184^2 .

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-1868320481 is a prime.

It is a super-3 number, since 3×1868320481³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868320411) 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, 538091 + ... + 541551.

It is an arithmetic number, because the mean of its divisors is an integer number (234901893).

Almost surely, 2^1868320481 is an apocalyptic number.

It is an amenable number.

1868320481 is a deficient number, since it is larger than the sum of its proper divisors (10894663).

1868320481 is a wasteful number, since it uses less digits than its factorization.

1868320481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6451.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 1868320481 is about 43224.0729339566. The cubic root of 1868320481 is about 1231.6400184506.

The spelling of 1868320481 in words is "one billion, eight hundred sixty-eight million, three hundred twenty thousand, four hundred eighty-one".