1863913863892 has 36 divisors (see below), whose sum is σ = 3340463406420. Its totient is φ = 910012828032.

The previous prime is 1863913863871. The next prime is 1863913863893. The reversal of 1863913863892 is 2983683193681.

It can be written as a sum of positive squares in 2 ways, for example, as 507793059216 + 1356120804676 = 712596^2 + 1164526^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1863913863893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26064778 + ... + 26136190.

Almost surely, 2^{1863913863892} is an apocalyptic number.

It is an amenable number.

1863913863892 is a deficient number, since it is larger than the sum of its proper divisors (1476549542528).

1863913863892 is a wasteful number, since it uses less digits than its factorization.

1863913863892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75032 (or 74987 counting only the distinct ones).

The product of its digits is 80621568, while the sum is 67.

The spelling of 1863913863892 in words is "one trillion, eight hundred sixty-three billion, nine hundred thirteen million, eight hundred sixty-three thousand, eight hundred ninety-two".