158966361649 has 2 divisors, whose sum is σ = 158966361650. Its totient is φ = 158966361648.

The previous prime is 158966361641. The next prime is 158966361709. The reversal of 158966361649 is 946163669851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94580851600 + 64385510049 = 307540^2 + 253743^2 .

It is a cyclic number.

It is not a de Polignac number, because 158966361649 - 2³ = 158966361641 is a prime.

It is not a weakly prime, because it can be changed into another prime (158966361641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79483180824 + 79483180825.

It is an arithmetic number, because the mean of its divisors is an integer number (79483180825).

Almost surely, 2^158966361649 is an apocalyptic number.

It is an amenable number.

158966361649 is a deficient number, since it is larger than the sum of its proper divisors (1).

158966361649 is an equidigital number, since it uses as much as digits as its factorization.

158966361649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50388480, while the sum is 64.

The spelling of 158966361649 in words is "one hundred fifty-eight billion, nine hundred sixty-six million, three hundred sixty-one thousand, six hundred forty-nine".