159781181287 has 16 divisors (see below), whose sum is σ = 196728351232. Its totient is φ = 126372324960.

The previous prime is 159781181279. The next prime is 159781181293. The reversal of 159781181287 is 782181187951.

It is a happy number.

It is not a de Polignac number, because 159781181287 - 2³ = 159781181279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159781181267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90789 + ... + 572542.

It is an arithmetic number, because the mean of its divisors is an integer number (12295521952).

Almost surely, 2^159781181287 is an apocalyptic number.

159781181287 is a deficient number, since it is larger than the sum of its proper divisors (36947169945).

159781181287 is a wasteful number, since it uses less digits than its factorization.

159781181287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665998.

The product of its digits is 2257920, while the sum is 58.

The spelling of 159781181287 in words is "one hundred fifty-nine billion, seven hundred eighty-one million, one hundred eighty-one thousand, two hundred eighty-seven".