159800797042756 has 81 divisors (see below), whose sum is σ = 300241600667589. Its totient is φ = 74405696544768.

The previous prime is 159800797042741. The next prime is 159800797042759. The reversal of 159800797042756 is 657240797008951.

The square root of 159800797042756 is 12641234.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 88924334200900 + 70876462841856 = 9429970^2 + 8418816^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (159800797042759) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 41690787816 + ... + 41690791648.

Almost surely, 2^{159800797042756} is an apocalyptic number.

159800797042756 is the 12641234-th square number.

It is an amenable number.

159800797042756 is a deficient number, since it is larger than the sum of its proper divisors (140440803624833).

159800797042756 is an frugal number, since it uses more digits than its factorization.

159800797042756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7898 (or 3949 counting only the distinct ones).

The product of its (nonzero) digits is 266716800, while the sum is 70.

The spelling of 159800797042756 in words is "one hundred fifty-nine trillion, eight hundred billion, seven hundred ninety-seven million, forty-two thousand, seven hundred fifty-six".