159230190781 has 2 divisors, whose sum is σ = 159230190782. Its totient is φ = 159230190780.

The previous prime is 159230190731. The next prime is 159230190811. The reversal of 159230190781 is 187091032951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133346207556 + 25883983225 = 365166^2 + 160885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159230190781 is a prime.

It is a super-2 number, since 2×159230190781² (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 (159230190701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79615095390 + 79615095391.

It is an arithmetic number, because the mean of its divisors is an integer number (79615095391).

Almost surely, 2^159230190781 is an apocalyptic number.

It is an amenable number.

159230190781 is a deficient number, since it is larger than the sum of its proper divisors (1).

159230190781 is an equidigital number, since it uses as much as digits as its factorization.

159230190781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 46.

The spelling of 159230190781 in words is "one hundred fifty-nine billion, two hundred thirty million, one hundred ninety thousand, seven hundred eighty-one".