1319681840872 has 8 divisors (see below), whose sum is σ = 2474403451650. Its totient is φ = 659840920432.

The previous prime is 1319681840863. The next prime is 1319681840909. The reversal of 1319681840872 is 2780481869131.

It can be written as a sum of positive squares in only one way, i.e., 1299951143716 + 19730697156 = 1140154^2 + 140466^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1319681840872² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82480115047 + ... + 82480115062.

Almost surely, 2^{1319681840872} is an apocalyptic number.

It is an amenable number.

1319681840872 is a deficient number, since it is larger than the sum of its proper divisors (1154721610778).

1319681840872 is a wasteful number, since it uses less digits than its factorization.

1319681840872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164960230115 (or 164960230111 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 58.

The spelling of 1319681840872 in words is "one trillion, three hundred nineteen billion, six hundred eighty-one million, eight hundred forty thousand, eight hundred seventy-two".