1939284666864 has 80 divisors (see below), whose sum is σ = 5567024833440. Its totient is φ = 646363238400.

The previous prime is 1939284666799. The next prime is 1939284666871. The reversal of 1939284666864 is 4686664829391.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1939284666792 and 1939284666801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4175914 + ... + 4617014.

It is an arithmetic number, because the mean of its divisors is an integer number (69587810418).

Almost surely, 2^{1939284666864} is an apocalyptic number.

It is an amenable number.

1939284666864 is an abundant number, since it is smaller than the sum of its proper divisors (3627740166576).

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

1939284666864 is a wasteful number, since it uses less digits than its factorization.

1939284666864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451295 (or 451283 counting only the distinct ones).

The product of its digits is 644972544, while the sum is 72.

The spelling of 1939284666864 in words is "one trillion, nine hundred thirty-nine billion, two hundred eighty-four million, six hundred sixty-six thousand, eight hundred sixty-four".