145666831823 has 4 divisors (see below), whose sum is σ = 145669103568. Its totient is φ = 145664560080.

The previous prime is 145666831811. The next prime is 145666831831. The reversal of 145666831823 is 328138666541.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 145666831823 - 2³⁰ = 144593089999 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 (145666831883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036811 + ... + 1168892.

It is an arithmetic number, because the mean of its divisors is an integer number (36417275892).

Almost surely, 2^145666831823 is an apocalyptic number.

145666831823 is a deficient number, since it is larger than the sum of its proper divisors (2271745).

145666831823 is an equidigital number, since it uses as much as digits as its factorization.

145666831823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271744.

The product of its digits is 4976640, while the sum is 53.

The spelling of 145666831823 in words is "one hundred forty-five billion, six hundred sixty-six million, eight hundred thirty-one thousand, eight hundred twenty-three".