3681091449 has 12 divisors (see below), whose sum is σ = 6076722496. Its totient is φ = 2103480792.

The previous prime is 3681091391. The next prime is 3681091451. The reversal of 3681091449 is 9441901863.

It is not a de Polignac number, because 3681091449 - 2¹³ = 3681083257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3681091499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29214949 + ... + 29215074.

Almost surely, 2^3681091449 is an apocalyptic number.

It is an amenable number.

3681091449 is a deficient number, since it is larger than the sum of its proper divisors (2395631047).

3681091449 is a wasteful number, since it uses less digits than its factorization.

3681091449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58430036 (or 58430033 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 3681091449 is about 60671.9988874604. The cubic root of 3681091449 is about 1544.0411444433.

The spelling of 3681091449 in words is "three billion, six hundred eighty-one million, ninety-one thousand, four hundred forty-nine".