23136994668649 has 9 divisors (see below), whose sum is σ = 23536082463037. Its totient is φ = 22744563231244.

The previous prime is 23136994668589. The next prime is 23136994668653. The reversal of 23136994668649 is 94686649963132.

The square root of 23136994668649 is 4810093.

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

It is not a de Polignac number, because 23136994668649 - 2¹³ = 23136994660457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23136994668349) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 283754724 + ... + 283836250.

Almost surely, 2^{23136994668649} is an apocalyptic number.

23136994668649 is the 4810093-rd square number.

23136994668649 is the 2405047-th centered octagonal number.

It is an amenable number.

23136994668649 is a deficient number, since it is larger than the sum of its proper divisors (399087794388).

23136994668649 is an frugal number, since it uses more digits than its factorization.

23136994668649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163172 (or 81586 counting only the distinct ones).

The product of its digits is 2176782336, while the sum is 76.

The spelling of 23136994668649 in words is "twenty-three trillion, one hundred thirty-six billion, nine hundred ninety-four million, six hundred sixty-eight thousand, six hundred forty-nine".