3865264653438 has 24 divisors (see below), whose sum is σ = 8375253469128. Its totient is φ = 1288342568592.

The previous prime is 3865264653407. The next prime is 3865264653443. The reversal of 3865264653438 is 8343564625683.

3865264653438 is a `hidden beast` number, since 3 + 8 + 6 + 5 + 2 + 64 + 6 + 534 + 38 = 666.

It is a super-2 number, since 2×3865264653438² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 6279720 + ... + 6867707.

It is an arithmetic number, because the mean of its divisors is an integer number (348968894547).

Almost surely, 2^{3865264653438} is an apocalyptic number.

3865264653438 is an abundant number, since it is smaller than the sum of its proper divisors (4509988815690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3865264653438 is a wasteful number, since it uses less digits than its factorization.

3865264653438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13163768 (or 13163765 counting only the distinct ones).

The product of its digits is 298598400, while the sum is 63.

The spelling of 3865264653438 in words is "three trillion, eight hundred sixty-five billion, two hundred sixty-four million, six hundred fifty-three thousand, four hundred thirty-eight".