239991851506049 has 2 divisors, whose sum is σ = 239991851506050. Its totient is φ = 239991851506048.

The previous prime is 239991851506021. The next prime is 239991851506139. The reversal of 239991851506049 is 940605158199932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191019847506049 + 48972004000000 = 13820993^2 + 6998000^2 .

It is a cyclic number.

It is not a de Polignac number, because 239991851506049 - 2⁸ = 239991851505793 is a prime.

It is not a weakly prime, because it can be changed into another prime (239991851206049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119995925753024 + 119995925753025.

It is an arithmetic number, because the mean of its divisors is an integer number (119995925753025).

Almost surely, 2^{239991851506049} is an apocalyptic number.

It is an amenable number.

239991851506049 is a deficient number, since it is larger than the sum of its proper divisors (1).

239991851506049 is an equidigital number, since it uses as much as digits as its factorization.

239991851506049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188956800, while the sum is 71.

The spelling of 239991851506049 in words is "two hundred thirty-nine trillion, nine hundred ninety-one billion, eight hundred fifty-one million, five hundred six thousand, forty-nine".