23779033561 has 2 divisors, whose sum is σ = 23779033562. Its totient is φ = 23779033560.

The previous prime is 23779033559. The next prime is 23779033567. The reversal of 23779033561 is 16533097732.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16967667600 + 6811365961 = 130260^2 + 82531^2 .

It is a cyclic number.

It is not a de Polignac number, because 23779033561 - 2¹ = 23779033559 is a prime.

Together with 23779033559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23779033567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11889516780 + 11889516781.

It is an arithmetic number, because the mean of its divisors is an integer number (11889516781).

Almost surely, 2^23779033561 is an apocalyptic number.

It is an amenable number.

23779033561 is a deficient number, since it is larger than the sum of its proper divisors (1).

23779033561 is an equidigital number, since it uses as much as digits as its factorization.

23779033561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 714420, while the sum is 46.

The spelling of 23779033561 in words is "twenty-three billion, seven hundred seventy-nine million, thirty-three thousand, five hundred sixty-one".