653436426466623 has 4 divisors (see below), whose sum is σ = 871248568622168. Its totient is φ = 435624284311080.

The previous prime is 653436426466601. The next prime is 653436426466721. The reversal of 653436426466623 is 326664624634356.

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

It is not a de Polignac number, because 653436426466623 - 2¹⁴ = 653436426450239 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 (653436426466223) 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, 108906071077768 + ... + 108906071077773.

It is an arithmetic number, because the mean of its divisors is an integer number (217812142155542).

Almost surely, 2^{653436426466623} is an apocalyptic number.

653436426466623 is a deficient number, since it is larger than the sum of its proper divisors (217812142155545).

653436426466623 is a wasteful number, since it uses less digits than its factorization.

653436426466623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217812142155544.

The product of its digits is 1612431360, while the sum is 66.

The spelling of 653436426466623 in words is "six hundred fifty-three trillion, four hundred thirty-six billion, four hundred twenty-six million, four hundred sixty-six thousand, six hundred twenty-three".