158145519661 has 2 divisors, whose sum is σ = 158145519662. Its totient is φ = 158145519660.

The previous prime is 158145519607. The next prime is 158145519691. The reversal of 158145519661 is 166915541851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117096733636 + 41048786025 = 342194^2 + 202605^2 .

It is an emirp because it is prime and its reverse (166915541851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158145519661 - 2²⁷ = 158011301933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 158145519599 and 158145519608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158145519691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79072759830 + 79072759831.

It is an arithmetic number, because the mean of its divisors is an integer number (79072759831).

Almost surely, 2^158145519661 is an apocalyptic number.

It is an amenable number.

158145519661 is a deficient number, since it is larger than the sum of its proper divisors (1).

158145519661 is an equidigital number, since it uses as much as digits as its factorization.

158145519661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296000, while the sum is 52.

The spelling of 158145519661 in words is "one hundred fifty-eight billion, one hundred forty-five million, five hundred nineteen thousand, six hundred sixty-one".