12145817783 has 16 divisors (see below), whose sum is σ = 13386926592. Its totient is φ = 10927668000.

The previous prime is 12145817777. The next prime is 12145817813. The reversal of 12145817783 is 38771854121.

It is a cyclic number.

It is not a de Polignac number, because 12145817783 - 2²⁰ = 12144769207 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 (12145814783) 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, 3103598 + ... + 3107508.

It is an arithmetic number, because the mean of its divisors is an integer number (836682912).

Almost surely, 2^12145817783 is an apocalyptic number.

12145817783 is a deficient number, since it is larger than the sum of its proper divisors (1241108809).

12145817783 is a wasteful number, since it uses less digits than its factorization.

12145817783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6766.

The product of its digits is 376320, while the sum is 47.

It can be divided in two parts, 12145 and 817783, that added together give a palindrome (829928).

The spelling of 12145817783 in words is "twelve billion, one hundred forty-five million, eight hundred seventeen thousand, seven hundred eighty-three".