159438666623 has 2 divisors, whose sum is σ = 159438666624. Its totient is φ = 159438666622.

The previous prime is 159438666619. The next prime is 159438666641. The reversal of 159438666623 is 326666834951.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 159438666623 - 2² = 159438666619 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159438666223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79719333311 + 79719333312.

It is an arithmetic number, because the mean of its divisors is an integer number (79719333312).

Almost surely, 2^159438666623 is an apocalyptic number.

159438666623 is a deficient number, since it is larger than the sum of its proper divisors (1).

159438666623 is an equidigital number, since it uses as much as digits as its factorization.

159438666623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33592320, while the sum is 59.

The spelling of 159438666623 in words is "one hundred fifty-nine billion, four hundred thirty-eight million, six hundred sixty-six thousand, six hundred twenty-three".