653451503123 has 4 divisors (see below), whose sum is σ = 653500285200. Its totient is φ = 653402721048.

The previous prime is 653451503113. The next prime is 653451503147. The reversal of 653451503123 is 321305154356.

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 653451503123 - 2⁶ = 653451503059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653451503113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24370940 + ... + 24397737.

It is an arithmetic number, because the mean of its divisors is an integer number (163375071300).

Almost surely, 2^653451503123 is an apocalyptic number.

653451503123 is a deficient number, since it is larger than the sum of its proper divisors (48782077).

653451503123 is a wasteful number, since it uses less digits than its factorization.

653451503123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48782076.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 653451503123 its reverse (321305154356), we get a palindrome (974756657479).

The spelling of 653451503123 in words is "six hundred fifty-three billion, four hundred fifty-one million, five hundred three thousand, one hundred twenty-three".