23905555249 has 2 divisors, whose sum is σ = 23905555250. Its totient is φ = 23905555248.

The previous prime is 23905555237. The next prime is 23905555291. The reversal of 23905555249 is 94255550932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22863556849 + 1041998400 = 151207^2 + 32280^2 .

It is a cyclic number.

It is not a de Polignac number, because 23905555249 - 2⁵ = 23905555217 is a prime.

It is not a weakly prime, because it can be changed into another prime (23905555049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11952777624 + 11952777625.

It is an arithmetic number, because the mean of its divisors is an integer number (11952777625).

Almost surely, 2^23905555249 is an apocalyptic number.

It is an amenable number.

23905555249 is a deficient number, since it is larger than the sum of its proper divisors (1).

23905555249 is an equidigital number, since it uses as much as digits as its factorization.

23905555249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430000, while the sum is 49.

The spelling of 23905555249 in words is "twenty-three billion, nine hundred five million, five hundred fifty-five thousand, two hundred forty-nine".