156201155561171 has 16 divisors (see below), whose sum is σ = 179207411420160. Its totient is φ = 133368033375360.

The previous prime is 156201155561141. The next prime is 156201155561173. The reversal of 156201155561171 is 171165551102651.

It is not a de Polignac number, because 156201155561171 - 2¹⁴ = 156201155544787 is a prime.

It is a super-3 number, since 3×156201155561171³ (a number of 44 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (156201155561173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2682395 + ... + 17877291.

It is an arithmetic number, because the mean of its divisors is an integer number (11200463213760).

Almost surely, 2^{156201155561171} is an apocalyptic number.

156201155561171 is a deficient number, since it is larger than the sum of its proper divisors (23006255858989).

156201155561171 is a wasteful number, since it uses less digits than its factorization.

156201155561171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15200594.

The product of its (nonzero) digits is 315000, while the sum is 47.

The spelling of 156201155561171 in words is "one hundred fifty-six trillion, two hundred one billion, one hundred fifty-five million, five hundred sixty-one thousand, one hundred seventy-one".