158439893819 has 2 divisors, whose sum is σ = 158439893820. Its totient is φ = 158439893818.

The previous prime is 158439893803. The next prime is 158439893867. The reversal of 158439893819 is 918398934851.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 158439893819 - 2⁴ = 158439893803 is a prime.

It is a super-2 number, since 2×158439893819² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (158439833819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79219946909 + 79219946910.

It is an arithmetic number, because the mean of its divisors is an integer number (79219946910).

Almost surely, 2^158439893819 is an apocalyptic number.

158439893819 is a deficient number, since it is larger than the sum of its proper divisors (1).

158439893819 is an equidigital number, since it uses as much as digits as its factorization.

158439893819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67184640, while the sum is 68.

The spelling of 158439893819 in words is "one hundred fifty-eight billion, four hundred thirty-nine million, eight hundred ninety-three thousand, eight hundred nineteen".