653456437231 has 4 divisors (see below), whose sum is σ = 703722317032. Its totient is φ = 603190557432.

The previous prime is 653456437217. The next prime is 653456437237. The reversal of 653456437231 is 132734654356.

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 653456437231 - 2⁹ = 653456436719 is a prime.

It is a super-2 number, since 2×653456437231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653456437237) 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, 25132939881 + ... + 25132939906.

It is an arithmetic number, because the mean of its divisors is an integer number (175930579258).

Almost surely, 2^653456437231 is an apocalyptic number.

653456437231 is a deficient number, since it is larger than the sum of its proper divisors (50265879801).

653456437231 is a wasteful number, since it uses less digits than its factorization.

653456437231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50265879800.

The product of its digits is 5443200, while the sum is 49.

The spelling of 653456437231 in words is "six hundred fifty-three billion, four hundred fifty-six million, four hundred thirty-seven thousand, two hundred thirty-one".