23149774649 has 2 divisors, whose sum is σ = 23149774650. Its totient is φ = 23149774648.

The previous prime is 23149774513. The next prime is 23149774693. The reversal of 23149774649 is 94647794132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22404102400 + 745672249 = 149680^2 + 27307^2 .

It is a cyclic number.

It is not a de Polignac number, because 23149774649 - 2¹⁶ = 23149709113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23149774594 and 23149774603.

It is not a weakly prime, because it can be changed into another prime (23149776649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11574887324 + 11574887325.

It is an arithmetic number, because the mean of its divisors is an integer number (11574887325).

Almost surely, 2^23149774649 is an apocalyptic number.

It is an amenable number.

23149774649 is a deficient number, since it is larger than the sum of its proper divisors (1).

23149774649 is an equidigital number, since it uses as much as digits as its factorization.

23149774649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 56.

The spelling of 23149774649 in words is "twenty-three billion, one hundred forty-nine million, seven hundred seventy-four thousand, six hundred forty-nine".