172008020853 has 10 divisors (see below), whose sum is σ = 256950253494. Its totient is φ = 114672013848.

The previous prime is 172008020839. The next prime is 172008020897. The reversal of 172008020853 is 358020800271.

It can be written as a sum of positive squares in only one way, i.e., 125728394724 + 46279626129 = 354582^2 + 215127^2 .

It is not a de Polignac number, because 172008020853 - 2¹⁰ = 172008019829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172008021853) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1061777826 + ... + 1061777987.

Almost surely, 2^172008020853 is an apocalyptic number.

It is an amenable number.

172008020853 is a deficient number, since it is larger than the sum of its proper divisors (84942232641).

172008020853 is an equidigital number, since it uses as much as digits as its factorization.

172008020853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123555825 (or 2123555816 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The spelling of 172008020853 in words is "one hundred seventy-two billion, eight million, twenty thousand, eight hundred fifty-three".