1981885848823 has 32 divisors (see below), whose sum is σ = 2218638090240. Its totient is φ = 1759367070720.

The previous prime is 1981885848821. The next prime is 1981885848847. The reversal of 1981885848823 is 3288485881891.

It is not a de Polignac number, because 1981885848823 - 2¹ = 1981885848821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981885848821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70623811 + ... + 70651867.

It is an arithmetic number, because the mean of its divisors is an integer number (69332440320).

Almost surely, 2^{1981885848823} is an apocalyptic number.

1981885848823 is a deficient number, since it is larger than the sum of its proper divisors (236752241417).

1981885848823 is a wasteful number, since it uses less digits than its factorization.

1981885848823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29047.

The product of its digits is 283115520, while the sum is 73.

The spelling of 1981885848823 in words is "one trillion, nine hundred eighty-one billion, eight hundred eighty-five million, eight hundred forty-eight thousand, eight hundred twenty-three".