8610721638273 has 24 divisors (see below), whose sum is σ = 12648964667040. Its totient is φ = 5642985369600.

The previous prime is 8610721638251. The next prime is 8610721638283. The reversal of 8610721638273 is 3728361270168.

It is a happy number.

8610721638273 is a `hidden beast` number, since 8 + 610 + 7 + 2 + 16 + 3 + 8 + 2 + 7 + 3 = 666.

It is not a de Polignac number, because 8610721638273 - 2¹⁸ = 8610721376129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8610721638223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15579265 + ... + 16122497.

It is an arithmetic number, because the mean of its divisors is an integer number (527040194460).

Almost surely, 2^{8610721638273} is an apocalyptic number.

It is an amenable number.

8610721638273 is a deficient number, since it is larger than the sum of its proper divisors (4038243028767).

8610721638273 is a wasteful number, since it uses less digits than its factorization.

8610721638273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573149 (or 573146 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 8610721638273 in words is "eight trillion, six hundred ten billion, seven hundred twenty-one million, six hundred thirty-eight thousand, two hundred seventy-three".