1965978883256 has 16 divisors (see below), whose sum is σ = 3686340861000. Its totient is φ = 982954653664.

The previous prime is 1965978883189. The next prime is 1965978883259. The reversal of 1965978883256 is 6523888795691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1965978883259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4107530 + ... + 4561113.

Almost surely, 2^{1965978883256} is an apocalyptic number.

It is an amenable number.

1965978883256 is a deficient number, since it is larger than the sum of its proper divisors (1720361977744).

1965978883256 is a wasteful number, since it uses less digits than its factorization.

1965978883256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8696998 (or 8696994 counting only the distinct ones).

The product of its digits is 1567641600, while the sum is 77.

The spelling of 1965978883256 in words is "one trillion, nine hundred sixty-five billion, nine hundred seventy-eight million, eight hundred eighty-three thousand, two hundred fifty-six".