3681814551 has 4 divisors (see below), whose sum is σ = 4909086072. Its totient is φ = 2454543032.

The previous prime is 3681814529. The next prime is 3681814571. The reversal of 3681814551 is 1554181863.

3681814551 is digitally balanced in base 3, 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 is a cyclic number.

It is not a de Polignac number, because 3681814551 - 2²⁶ = 3614705687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681814501) 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, 613635756 + ... + 613635761.

It is an arithmetic number, because the mean of its divisors is an integer number (1227271518).

Almost surely, 2^3681814551 is an apocalyptic number.

3681814551 is a deficient number, since it is larger than the sum of its proper divisors (1227271521).

3681814551 is a wasteful number, since it uses less digits than its factorization.

3681814551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227271520.

The product of its digits is 115200, while the sum is 42.

The square root of 3681814551 is about 60677.9577029418. The cubic root of 3681814551 is about 1544.1422400156.

The spelling of 3681814551 in words is "three billion, six hundred eighty-one million, eight hundred fourteen thousand, five hundred fifty-one".