3865264665651 has 12 divisors (see below), whose sum is σ = 5584350319080. Its totient is φ = 2576293765920.

The previous prime is 3865264665641. The next prime is 3865264665683. The reversal of 3865264665651 is 1565664625683.

3865264665651 is a `hidden beast` number, since 3 + 8 + 6 + 5 + 2 + 6 + 4 + 66 + 565 + 1 = 666.

It is not a de Polignac number, because 3865264665651 - 2¹⁹ = 3865264141363 is a prime.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (3865264665641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45734146 + ... + 45818583.

It is an arithmetic number, because the mean of its divisors is an integer number (465362526590).

Almost surely, 2^{3865264665651} is an apocalyptic number.

3865264665651 is a deficient number, since it is larger than the sum of its proper divisors (1719085653429).

3865264665651 is a wasteful number, since it uses less digits than its factorization.

3865264665651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91557426 (or 91557423 counting only the distinct ones).

The product of its digits is 186624000, while the sum is 63.

The spelling of 3865264665651 in words is "three trillion, eight hundred sixty-five billion, two hundred sixty-four million, six hundred sixty-five thousand, six hundred fifty-one".