158862580021 has 2 divisors, whose sum is σ = 158862580022. Its totient is φ = 158862580020.

The previous prime is 158862579979. The next prime is 158862580043. The reversal of 158862580021 is 120085268851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139811679396 + 19050900625 = 373914^2 + 138025^2 .

It is an emirp because it is prime and its reverse (120085268851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158862580021 - 2¹⁵ = 158862547253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158862580091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79431290010 + 79431290011.

It is an arithmetic number, because the mean of its divisors is an integer number (79431290011).

Almost surely, 2^158862580021 is an apocalyptic number.

It is an amenable number.

158862580021 is a deficient number, since it is larger than the sum of its proper divisors (1).

158862580021 is an equidigital number, since it uses as much as digits as its factorization.

158862580021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 307200, while the sum is 46.

The spelling of 158862580021 in words is "one hundred fifty-eight billion, eight hundred sixty-two million, five hundred eighty thousand, twenty-one".