158729448469 has 2 divisors, whose sum is σ = 158729448470. Its totient is φ = 158729448468.

The previous prime is 158729448391. The next prime is 158729448509. The reversal of 158729448469 is 964844927851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153640480900 + 5088967569 = 391970^2 + 71337^2 .

It is a cyclic number.

It is not a de Polignac number, because 158729448469 - 2²¹ = 158727351317 is a prime.

It is a super-2 number, since 2×158729448469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158729448169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79364724234 + 79364724235.

It is an arithmetic number, because the mean of its divisors is an integer number (79364724235).

Almost surely, 2^158729448469 is an apocalyptic number.

It is an amenable number.

158729448469 is a deficient number, since it is larger than the sum of its proper divisors (1).

158729448469 is an equidigital number, since it uses as much as digits as its factorization.

158729448469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139345920, while the sum is 67.

The spelling of 158729448469 in words is "one hundred fifty-eight billion, seven hundred twenty-nine million, four hundred forty-eight thousand, four hundred sixty-nine".