653432421123 has 24 divisors (see below), whose sum is σ = 945059137776. Its totient is φ = 435062376000.

The previous prime is 653432421091. The next prime is 653432421139. The reversal of 653432421123 is 321124234356.

653432421123 is a `hidden beast` number, since 6 + 5 + 3 + 432 + 4 + 211 + 2 + 3 = 666.

It is not a de Polignac number, because 653432421123 - 2⁵ = 653432421091 is a prime.

It is a super-2 number, since 2×653432421123² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (653432421143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33635953 + ... + 33655373.

It is an arithmetic number, because the mean of its divisors is an integer number (39377464074).

Almost surely, 2^653432421123 is an apocalyptic number.

653432421123 is a deficient number, since it is larger than the sum of its proper divisors (291626716653).

653432421123 is a wasteful number, since it uses less digits than its factorization.

653432421123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24035 (or 24032 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

Adding to 653432421123 its reverse (321124234356), we get a palindrome (974556655479).

The spelling of 653432421123 in words is "six hundred fifty-three billion, four hundred thirty-two million, four hundred twenty-one thousand, one hundred twenty-three".