3865961963472 has 120 divisors (see below), whose sum is σ = 12229063495200. Its totient is φ = 1046425782528.

The previous prime is 3865961963447. The next prime is 3865961963483. The reversal of 3865961963472 is 2743691695683.

It is a super-3 number, since 3×3865961963472³ (a number of 39 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3865961963397 and 3865961963406.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43210347 + ... + 43299722.

It is an arithmetic number, because the mean of its divisors is an integer number (101908862460).

Almost surely, 2^{3865961963472} is an apocalyptic number.

It is an amenable number.

3865961963472 is an abundant number, since it is smaller than the sum of its proper divisors (8363101531728).

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

3865961963472 is a wasteful number, since it uses less digits than its factorization.

3865961963472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86510113 (or 86510100 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 69.

The spelling of 3865961963472 in words is "three trillion, eight hundred sixty-five billion, nine hundred sixty-one million, nine hundred sixty-three thousand, four hundred seventy-two".