3781549863 has 36 divisors (see below), whose sum is σ = 6842814888. Its totient is φ = 1994660640.

The previous prime is 3781549847. The next prime is 3781549867. The reversal of 3781549863 is 3689451873.

3781549863 is a `hidden beast` number, since 37 + 8 + 1 + 549 + 8 + 63 = 666.

It is not a de Polignac number, because 3781549863 - 2⁴ = 3781549847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781549867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 324073 + ... + 335538.

Almost surely, 2^3781549863 is an apocalyptic number.

3781549863 is a deficient number, since it is larger than the sum of its proper divisors (3061265025).

3781549863 is a wasteful number, since it uses less digits than its factorization.

3781549863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659644 (or 659634 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 3781549863 is about 61494.3075658227. The cubic root of 3781549863 is about 1557.9611023766.

It can be divided in two parts, 37815 and 49863, that added together give a palindrome (87678).

The spelling of 3781549863 in words is "three billion, seven hundred eighty-one million, five hundred forty-nine thousand, eight hundred sixty-three".