11661534023 has 2 divisors, whose sum is σ = 11661534024. Its totient is φ = 11661534022.

The previous prime is 11661533951. The next prime is 11661534041. The reversal of 11661534023 is 32043516611.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11661534023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11661534923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5830767011 + 5830767012.

It is an arithmetic number, because the mean of its divisors is an integer number (5830767012).

Almost surely, 2^11661534023 is an apocalyptic number.

11661534023 is a deficient number, since it is larger than the sum of its proper divisors (1).

11661534023 is an equidigital number, since it uses as much as digits as its factorization.

11661534023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 11661534023 in words is "eleven billion, six hundred sixty-one million, five hundred thirty-four thousand, twenty-three".