23171577621749 has 2 divisors, whose sum is σ = 23171577621750. Its totient is φ = 23171577621748.

The previous prime is 23171577621737. The next prime is 23171577621809. The reversal of 23171577621749 is 94712677517132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22314947776900 + 856629844849 = 4723870^2 + 925543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23171577621749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23171577621691 and 23171577621700.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23171577629749) 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, 11585788810874 + 11585788810875.

It is an arithmetic number, because the mean of its divisors is an integer number (11585788810875).

Almost surely, 2^{23171577621749} is an apocalyptic number.

It is an amenable number.

23171577621749 is a deficient number, since it is larger than the sum of its proper divisors (1).

23171577621749 is an equidigital number, since it uses as much as digits as its factorization.

23171577621749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31116960, while the sum is 62.

The spelling of 23171577621749 in words is "twenty-three trillion, one hundred seventy-one billion, five hundred seventy-seven million, six hundred twenty-one thousand, seven hundred forty-nine".