1806241681 has 16 divisors (see below), whose sum is σ = 1922169600. Its totient is φ = 1693771200.

The previous prime is 1806241673. The next prime is 1806241699. The reversal of 1806241681 is 1861426081.

It is a cyclic number.

It is not a de Polignac number, because 1806241681 - 2³ = 1806241673 is a prime.

It is a super-2 number, since 2×1806241681² = 6525018020363411522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1806241681.

It is not an unprimeable number, because it can be changed into a prime (1806241651) 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, 235495 + ... + 243043.

It is an arithmetic number, because the mean of its divisors is an integer number (120135600).

Almost surely, 2^1806241681 is an apocalyptic number.

It is an amenable number.

1806241681 is a deficient number, since it is larger than the sum of its proper divisors (115927919).

1806241681 is a wasteful number, since it uses less digits than its factorization.

1806241681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7776.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 1806241681 is about 42499.9021292991. The cubic root of 1806241681 is about 1217.8448201743.

The spelling of 1806241681 in words is "one billion, eight hundred six million, two hundred forty-one thousand, six hundred eighty-one".