3804366781 has 4 divisors (see below), whose sum is σ = 3825385564. Its totient is φ = 3783348000.

The previous prime is 3804366763. The next prime is 3804366793. The reversal of 3804366781 is 1876634083.

3804366781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70056900 + 3734309881 = 8370^2 + 61109^2 .

It is a cyclic number.

It is not a de Polignac number, because 3804366781 - 2¹⁵ = 3804334013 is a prime.

It is a super-2 number, since 2×3804366781² = 28946413208752603922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3804366701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10509120 + ... + 10509481.

It is an arithmetic number, because the mean of its divisors is an integer number (956346391).

Almost surely, 2^3804366781 is an apocalyptic number.

It is an amenable number.

3804366781 is a deficient number, since it is larger than the sum of its proper divisors (21018783).

3804366781 is a wasteful number, since it uses less digits than its factorization.

3804366781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21018782.

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 3804366781 is about 61679.5491309721. The cubic root of 3804366781 is about 1561.0882693740.

The spelling of 3804366781 in words is "three billion, eight hundred four million, three hundred sixty-six thousand, seven hundred eighty-one".