3681551863 has 4 divisors (see below), whose sum is σ = 4016238408. Its totient is φ = 3346865320.

The previous prime is 3681551831. The next prime is 3681551893.

3681551863 is nontrivially palindromic in base 10.

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 3681551863 - 2⁵ = 3681551831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681551893) 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, 167343256 + ... + 167343277.

It is an arithmetic number, because the mean of its divisors is an integer number (1004059602).

Almost surely, 2^3681551863 is an apocalyptic number.

3681551863 is a deficient number, since it is larger than the sum of its proper divisors (334686545).

3681551863 is a wasteful number, since it uses less digits than its factorization.

3681551863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334686544.

The product of its digits is 518400, while the sum is 46.

The square root of 3681551863 is about 60675.7930562098. The cubic root of 3681551863 is about 1544.1055156162.

The spelling of 3681551863 in words is "three billion, six hundred eighty-one million, five hundred fifty-one thousand, eight hundred sixty-three".