23500185649 has 2 divisors, whose sum is σ = 23500185650. Its totient is φ = 23500185648.

The previous prime is 23500185647. The next prime is 23500185707. The reversal of 23500185649 is 94658100532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13660934400 + 9839251249 = 116880^2 + 99193^2 .

It is a cyclic number.

It is not a de Polignac number, because 23500185649 - 2¹ = 23500185647 is a prime.

Together with 23500185647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23500185647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11750092824 + 11750092825.

It is an arithmetic number, because the mean of its divisors is an integer number (11750092825).

Almost surely, 2^23500185649 is an apocalyptic number.

It is an amenable number.

23500185649 is a deficient number, since it is larger than the sum of its proper divisors (1).

23500185649 is an equidigital number, since it uses as much as digits as its factorization.

23500185649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 23500185649 in words is "twenty-three billion, five hundred million, one hundred eighty-five thousand, six hundred forty-nine".