23233031728561 has 4 divisors (see below), whose sum is σ = 23233176806400. Its totient is φ = 23232886650724.

The previous prime is 23233031728531. The next prime is 23233031728619. The reversal of 23233031728561 is 16582713033232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23233031728561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23233031728531) 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, 72298441 + ... + 72619078.

It is an arithmetic number, because the mean of its divisors is an integer number (5808294201600).

Almost surely, 2^{23233031728561} is an apocalyptic number.

It is an amenable number.

23233031728561 is a deficient number, since it is larger than the sum of its proper divisors (145077839).

23233031728561 is a wasteful number, since it uses less digits than its factorization.

23233031728561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145077838.

The product of its (nonzero) digits is 1088640, while the sum is 46.

The spelling of 23233031728561 in words is "twenty-three trillion, two hundred thirty-three billion, thirty-one million, seven hundred twenty-eight thousand, five hundred sixty-one".