3965385427812 has 30 divisors (see below), whose sum is σ = 10366300795158. Its totient is φ = 1321795142496.

The previous prime is 3965385427769. The next prime is 3965385427813. The reversal of 3965385427812 is 2187245835693.

3965385427812 is a `hidden beast` number, since 3 + 9 + 6 + 5 + 3 + 8 + 542 + 7 + 81 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2622767294016 + 1342618133796 = 1619496^2 + 1158714^2 .

It is a super-2 number, since 2×3965385427812² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3965385427812.

It is not an unprimeable number, because it can be changed into a prime (3965385427813) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6119421633 + ... + 6119422280.

Almost surely, 2^{3965385427812} is an apocalyptic number.

It is an amenable number.

3965385427812 is an abundant number, since it is smaller than the sum of its proper divisors (6400915367346).

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

3965385427812 is a wasteful number, since it uses less digits than its factorization.

3965385427812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12238843929 (or 12238843918 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 63.

The spelling of 3965385427812 in words is "three trillion, nine hundred sixty-five billion, three hundred eighty-five million, four hundred twenty-seven thousand, eight hundred twelve".