11723551633 has 4 divisors (see below), whose sum is σ = 11744599860. Its totient is φ = 11702503408.

The previous prime is 11723551597. The next prime is 11723551649. The reversal of 11723551633 is 33615532711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33615532711 = 19471 ⋅1726441.

It can be written as a sum of positive squares in 2 ways, for example, as 418120704 + 11305430929 = 20448^2 + 106327^2 .

It is a cyclic number.

It is not a de Polignac number, because 11723551633 - 2¹⁷ = 11723420561 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11723551592 and 11723551601.

It is not an unprimeable number, because it can be changed into a prime (11723551933) 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, 10523278 + ... + 10524391.

It is an arithmetic number, because the mean of its divisors is an integer number (2936149965).

Almost surely, 2^11723551633 is an apocalyptic number.

It is an amenable number.

11723551633 is a deficient number, since it is larger than the sum of its proper divisors (21048227).

11723551633 is an equidigital number, since it uses as much as digits as its factorization.

11723551633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21048226.

The product of its digits is 56700, while the sum is 37.

The spelling of 11723551633 in words is "eleven billion, seven hundred twenty-three million, five hundred fifty-one thousand, six hundred thirty-three".