23149776649 has 2 divisors, whose sum is σ = 23149776650. Its totient is φ = 23149776648.

The previous prime is 23149776647. The next prime is 23149776679. The reversal of 23149776649 is 94667794132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12521610000 + 10628166649 = 111900^2 + 103093^2 .

It is a cyclic number.

It is not a de Polignac number, because 23149776649 - 2¹ = 23149776647 is a prime.

Together with 23149776647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 23149776593 and 23149776602.

It is not a weakly prime, because it can be changed into another prime (23149776641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11574888324 + 11574888325.

It is an arithmetic number, because the mean of its divisors is an integer number (11574888325).

Almost surely, 2^23149776649 is an apocalyptic number.

It is an amenable number.

23149776649 is a deficient number, since it is larger than the sum of its proper divisors (1).

23149776649 is an equidigital number, since it uses as much as digits as its factorization.

23149776649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 58.

The spelling of 23149776649 in words is "twenty-three billion, one hundred forty-nine million, seven hundred seventy-six thousand, six hundred forty-nine".