23444506601561 has 2 divisors, whose sum is σ = 23444506601562. Its totient is φ = 23444506601560.

The previous prime is 23444506601491. The next prime is 23444506601647. The reversal of 23444506601561 is 16510660544432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18240108472336 + 5204398129225 = 4270844^2 + 2281315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23444506601561 is a prime.

It is not a weakly prime, because it can be changed into another prime (23444506601261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11722253300780 + 11722253300781.

It is an arithmetic number, because the mean of its divisors is an integer number (11722253300781).

Almost surely, 2^{23444506601561} is an apocalyptic number.

It is an amenable number.

23444506601561 is a deficient number, since it is larger than the sum of its proper divisors (1).

23444506601561 is an equidigital number, since it uses as much as digits as its factorization.

23444506601561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2073600, while the sum is 47.

The spelling of 23444506601561 in words is "twenty-three trillion, four hundred forty-four billion, five hundred six million, six hundred one thousand, five hundred sixty-one".