4049684781 has 16 divisors (see below), whose sum is σ = 5420257920. Its totient is φ = 2689467840.

The previous prime is 4049684761. The next prime is 4049684803. The reversal of 4049684781 is 1874869404.

It is not a de Polignac number, because 4049684781 - 2¹¹ = 4049682733 is a prime.

It is a super-2 number, since 2×4049684781² = 32799893650926035922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4049684741) 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, 1822251 + ... + 1824471.

It is an arithmetic number, because the mean of its divisors is an integer number (338766120).

Almost surely, 2^4049684781 is an apocalyptic number.

It is an amenable number.

4049684781 is a deficient number, since it is larger than the sum of its proper divisors (1370573139).

4049684781 is a wasteful number, since it uses less digits than its factorization.

4049684781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4276.

The product of its (nonzero) digits is 1548288, while the sum is 51.

The square root of 4049684781 is about 63637.1336642373. The cubic root of 4049684781 is about 1593.9464983588.

The spelling of 4049684781 in words is "four billion, forty-nine million, six hundred eighty-four thousand, seven hundred eighty-one".