3861223765 has 12 divisors (see below), whose sum is σ = 5389953516. Its totient is φ = 2647696128.

The previous prime is 3861223747. The next prime is 3861223777. The reversal of 3861223765 is 5673221683.

3861223765 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 700872676 + 3160351089 = 26474^2 + 56217^2 .

It is not a de Polignac number, because 3861223765 - 2¹⁷ = 3861092693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7879804 + ... + 7880293.

It is an arithmetic number, because the mean of its divisors is an integer number (449162793).

Almost surely, 2^3861223765 is an apocalyptic number.

3861223765 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3861223765 is a deficient number, since it is larger than the sum of its proper divisors (1528729751).

3861223765 is a wasteful number, since it uses less digits than its factorization.

3861223765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15760116 (or 15760109 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

The square root of 3861223765 is about 62138.7460848704. The cubic root of 3861223765 is about 1568.8267655752.

The spelling of 3861223765 in words is "three billion, eight hundred sixty-one million, two hundred twenty-three thousand, seven hundred sixty-five".