1965856884838 has 48 divisors (see below), whose sum is σ = 3743698742784. Its totient is φ = 765582405840.

The previous prime is 1965856884821. The next prime is 1965856884881. The reversal of 1965856884838 is 8384886585691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2066695 + ... + 2864077.

It is an arithmetic number, because the mean of its divisors is an integer number (77993723808).

Almost surely, 2^{1965856884838} is an apocalyptic number.

1965856884838 is a deficient number, since it is larger than the sum of its proper divisors (1777841857946).

1965856884838 is a wasteful number, since it uses less digits than its factorization.

1965856884838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799697 (or 799690 counting only the distinct ones).

The product of its digits is 3185049600, while the sum is 79.

The spelling of 1965856884838 in words is "one trillion, nine hundred sixty-five billion, eight hundred fifty-six million, eight hundred eighty-four thousand, eight hundred thirty-eight".