1866853368363 has 4 divisors (see below), whose sum is σ = 2489137824488. Its totient is φ = 1244568912240.

The previous prime is 1866853368329. The next prime is 1866853368371. The reversal of 1866853368363 is 3638633586681.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1866853368363 - 2¹⁸ = 1866853106219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1866853368294 and 1866853368303.

It is not an unprimeable number, because it can be changed into a prime (1866853368383) 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, 311142228058 + ... + 311142228063.

It is an arithmetic number, because the mean of its divisors is an integer number (622284456122).

Almost surely, 2^{1866853368363} is an apocalyptic number.

1866853368363 is a deficient number, since it is larger than the sum of its proper divisors (622284456125).

1866853368363 is an equidigital number, since it uses as much as digits as its factorization.

1866853368363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622284456124.

The product of its digits is 268738560, while the sum is 66.

The spelling of 1866853368363 in words is "one trillion, eight hundred sixty-six billion, eight hundred fifty-three million, three hundred sixty-eight thousand, three hundred sixty-three".