23072645571509 has 2 divisors, whose sum is σ = 23072645571510. Its totient is φ = 23072645571508.

The previous prime is 23072645571491. The next prime is 23072645571551. The reversal of 23072645571509 is 90517554627032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21297763502500 + 1774882069009 = 4614950^2 + 1332247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23072645571509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23072645501509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11536322785754 + 11536322785755.

It is an arithmetic number, because the mean of its divisors is an integer number (11536322785755).

Almost surely, 2^{23072645571509} is an apocalyptic number.

It is an amenable number.

23072645571509 is a deficient number, since it is larger than the sum of its proper divisors (1).

23072645571509 is an equidigital number, since it uses as much as digits as its factorization.

23072645571509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876000, while the sum is 56.

The spelling of 23072645571509 in words is "twenty-three trillion, seventy-two billion, six hundred forty-five million, five hundred seventy-one thousand, five hundred nine".