23158728747109 has 2 divisors, whose sum is σ = 23158728747110. Its totient is φ = 23158728747108.

The previous prime is 23158728747067. The next prime is 23158728747127. The reversal of 23158728747109 is 90174782785132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17255067982084 + 5903660765025 = 4153922^2 + 2429745^2 .

It is a cyclic number.

It is not a de Polignac number, because 23158728747109 - 2⁷ = 23158728746981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23158728777109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11579364373554 + 11579364373555.

It is an arithmetic number, because the mean of its divisors is an integer number (11579364373555).

Almost surely, 2^{23158728747109} is an apocalyptic number.

It is an amenable number.

23158728747109 is a deficient number, since it is larger than the sum of its proper divisors (1).

23158728747109 is an equidigital number, since it uses as much as digits as its factorization.

23158728747109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47416320, while the sum is 64.

The spelling of 23158728747109 in words is "twenty-three trillion, one hundred fifty-eight billion, seven hundred twenty-eight million, seven hundred forty-seven thousand, one hundred nine".