3861865131663 has 64 divisors (see below), whose sum is σ = 6443367164928. Its totient is φ = 1998787000320.

The previous prime is 3861865131643. The next prime is 3861865131667. The reversal of 3861865131663 is 3661315681683.

3861865131663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3861865131663 - 2⁶ = 3861865131599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861865131667) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 80403031 + ... + 80451047.

It is an arithmetic number, because the mean of its divisors is an integer number (100677611952).

Almost surely, 2^{3861865131663} is an apocalyptic number.

3861865131663 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3861865131663 is a deficient number, since it is larger than the sum of its proper divisors (2581502033265).

3861865131663 is a wasteful number, since it uses less digits than its factorization.

3861865131663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49312.

The product of its digits is 11197440, while the sum is 57.

The spelling of 3861865131663 in words is "three trillion, eight hundred sixty-one billion, eight hundred sixty-five million, one hundred thirty-one thousand, six hundred sixty-three".