27201680163529 has 9 divisors (see below), whose sum is σ = 27355432677447. Its totient is φ = 27048787106784.

The previous prime is 27201680163523. The next prime is 27201680163571. The reversal of 27201680163529 is 92536108610272.

The square root of 27201680163529 is 5215523.

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

It can be written as a sum of positive squares in only one way, i.e., 25093236769225 + 2108443394304 = 5009315^2 + 1452048^2 .

It is not a de Polignac number, because 27201680163529 - 2¹⁵ = 27201680130761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27201680163523) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 933564049 + ... + 933593185.

Almost surely, 2^{27201680163529} is an apocalyptic number.

27201680163529 is the 5215523-rd square number.

27201680163529 is the 2607762-nd centered octagonal number.

It is an amenable number.

27201680163529 is a deficient number, since it is larger than the sum of its proper divisors (153752513918).

27201680163529 is an frugal number, since it uses more digits than its factorization.

27201680163529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58632 (or 29316 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 27201680163529 in words is "twenty-seven trillion, two hundred one billion, six hundred eighty million, one hundred sixty-three thousand, five hundred twenty-nine".