23953443361 has 3 divisors (see below), whose sum is σ = 23953598131. Its totient is φ = 23953288592.

The previous prime is 23953443337. The next prime is 23953443391. The reversal of 23953443361 is 16334435932.

The square root of 23953443361 is 154769.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 21409249761 + 2544193600 = 146319^2 + 50440^2 .

It is not a de Polignac number, because 23953443361 - 2⁷ = 23953443233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23953443391) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 77385 + ... + 232153.

Almost surely, 2^23953443361 is an apocalyptic number.

23953443361 is the 154769-th square number.

23953443361 is the 77385-th centered octagonal number.

It is an amenable number.

23953443361 is a deficient number, since it is larger than the sum of its proper divisors (154770).

23953443361 is an frugal number, since it uses more digits than its factorization.

23953443361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309538 (or 154769 counting only the distinct ones).

The product of its digits is 699840, while the sum is 43.

The spelling of 23953443361 in words is "twenty-three billion, nine hundred fifty-three million, four hundred forty-three thousand, three hundred sixty-one".