3694049404081 has 9 divisors (see below), whose sum is σ = 3741555213291. Its totient is φ = 3647139369744.

The previous prime is 3694049404069. The next prime is 3694049404159. The reversal of 3694049404081 is 1804049404963.

The square root of 3694049404081 is 1921991.

It is a perfect power (a square), and thus also a powerful number.

3694049404081 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2987508290481 + 706541113600 = 1728441^2 + 840560^2 .

It is not a de Polignac number, because 3694049404081 - 2⁵ = 3694049404049 is a prime.

It is a super-2 number, since 2×3694049404081² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3694049404051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 151825125 + ... + 151849453.

Almost surely, 2^{3694049404081} is an apocalyptic number.

3694049404081 is the 1921991-st square number.

3694049404081 is the 960996-th centered octagonal number.

It is an amenable number.

3694049404081 is a deficient number, since it is larger than the sum of its proper divisors (47505809210).

3694049404081 is an frugal number, since it uses more digits than its factorization.

3694049404081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48816 (or 24408 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 3694049404081 in words is "three trillion, six hundred ninety-four billion, forty-nine million, four hundred four thousand, eighty-one".