1771781231233 has 16 divisors (see below), whose sum is σ = 1930425073920. Its totient is φ = 1616377591296.

The previous prime is 1771781231147. The next prime is 1771781231243. The reversal of 1771781231233 is 3321321871771.

It is not a de Polignac number, because 1771781231233 - 2¹⁷ = 1771781100161 is a prime.

It is a super-3 number, since 3×1771781231233³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1771781231243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70435 + ... + 1883752.

It is an arithmetic number, because the mean of its divisors is an integer number (120651567120).

Almost surely, 2^{1771781231233} is an apocalyptic number.

1771781231233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1771781231233 is a deficient number, since it is larger than the sum of its proper divisors (158643842687).

1771781231233 is a wasteful number, since it uses less digits than its factorization.

1771781231233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955016.

The product of its digits is 296352, while the sum is 46.

The spelling of 1771781231233 in words is "one trillion, seven hundred seventy-one billion, seven hundred eighty-one million, two hundred thirty-one thousand, two hundred thirty-three".