27201620173 has 16 divisors (see below), whose sum is σ = 33544748160. Its totient is φ = 21479841216.

The previous prime is 27201620167. The next prime is 27201620209. The reversal of 27201620173 is 37102610272.

It is a cyclic number.

It is not a de Polignac number, because 27201620173 - 2¹³ = 27201611981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27201620153) 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, 247315 + ... + 339952.

It is an arithmetic number, because the mean of its divisors is an integer number (2096546760).

Almost surely, 2^27201620173 is an apocalyptic number.

It is an amenable number.

27201620173 is a deficient number, since it is larger than the sum of its proper divisors (6343127987).

27201620173 is a wasteful number, since it uses less digits than its factorization.

27201620173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587796.

The product of its (nonzero) digits is 7056, while the sum is 31.

Subtracting 27201620173 from its reverse (37102610272), we obtain a palindrome (9900990099).

The spelling of 27201620173 in words is "twenty-seven billion, two hundred one million, six hundred twenty thousand, one hundred seventy-three".