158614619981 has 2 divisors, whose sum is σ = 158614619982. Its totient is φ = 158614619980.

The previous prime is 158614619923. The next prime is 158614620011. The reversal of 158614619981 is 189916416851.

158614619981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158510681956 + 103938025 = 398134^2 + 10195^2 .

It is a cyclic number.

It is not a de Polignac number, because 158614619981 - 2²⁶ = 158547511117 is a prime.

It is a super-2 number, since 2×158614619981² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 158614619981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158614619281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79307309990 + 79307309991.

It is an arithmetic number, because the mean of its divisors is an integer number (79307309991).

Almost surely, 2^158614619981 is an apocalyptic number.

It is an amenable number.

158614619981 is a deficient number, since it is larger than the sum of its proper divisors (1).

158614619981 is an equidigital number, since it uses as much as digits as its factorization.

158614619981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3732480, while the sum is 59.

The spelling of 158614619981 in words is "one hundred fifty-eight billion, six hundred fourteen million, six hundred nineteen thousand, nine hundred eighty-one".