159721866942 has 32 divisors (see below), whose sum is σ = 348498854784. Its totient is φ = 48398512800.

The previous prime is 159721866919. The next prime is 159721867001. The reversal of 159721866942 is 249668127951.

It is a super-2 number, since 2×159721866942² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2388628 + ... + 2454584.

It is an arithmetic number, because the mean of its divisors is an integer number (10890589212).

Almost surely, 2^159721866942 is an apocalyptic number.

159721866942 is an abundant number, since it is smaller than the sum of its proper divisors (188776987842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

159721866942 is a wasteful number, since it uses less digits than its factorization.

159721866942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102664.

The product of its digits is 13063680, while the sum is 60.

The spelling of 159721866942 in words is "one hundred fifty-nine billion, seven hundred twenty-one million, eight hundred sixty-six thousand, nine hundred forty-two".