653423440023 has 16 divisors (see below), whose sum is σ = 974200558560. Its totient is φ = 432841002048.

The previous prime is 653423439961. The next prime is 653423440027. The reversal of 653423440023 is 320044324356.

It is not a de Polignac number, because 653423440023 - 2⁶ = 653423439959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 653423440023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653423440027) 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, 77068590 + ... + 77077067.

It is an arithmetic number, because the mean of its divisors is an integer number (60887534910).

Almost surely, 2^653423440023 is an apocalyptic number.

653423440023 is a deficient number, since it is larger than the sum of its proper divisors (320777118537).

653423440023 is a wasteful number, since it uses less digits than its factorization.

653423440023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154145823 (or 154145817 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 36.

Adding to 653423440023 its reverse (320044324356), we get a palindrome (973467764379).

The spelling of 653423440023 in words is "six hundred fifty-three billion, four hundred twenty-three million, four hundred forty thousand, twenty-three".