159778597249 has 2 divisors, whose sum is σ = 159778597250. Its totient is φ = 159778597248.

The previous prime is 159778597183. The next prime is 159778597291. The reversal of 159778597249 is 942795877951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132454507249 + 27324090000 = 363943^2 + 165300^2 .

It is a cyclic number.

It is not a de Polignac number, because 159778597249 - 2¹¹ = 159778595201 is a prime.

It is not a weakly prime, because it can be changed into another prime (159778591249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79889298624 + 79889298625.

It is an arithmetic number, because the mean of its divisors is an integer number (79889298625).

Almost surely, 2^159778597249 is an apocalyptic number.

It is an amenable number.

159778597249 is a deficient number, since it is larger than the sum of its proper divisors (1).

159778597249 is an equidigital number, since it uses as much as digits as its factorization.

159778597249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400075200, while the sum is 73.

The spelling of 159778597249 in words is "one hundred fifty-nine billion, seven hundred seventy-eight million, five hundred ninety-seven thousand, two hundred forty-nine".