206495173120 has 80 divisors (see below), whose sum is σ = 502078186368. Its totient is φ = 81434644480.

The previous prime is 206495173109. The next prime is 206495173123. The reversal of 206495173120 is 21371594602.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (206495173123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386284 + ... + 749803.

Almost surely, 2^206495173120 is an apocalyptic number.

206495173120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206495173120 is an abundant number, since it is smaller than the sum of its proper divisors (295583013248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206495173120 is an equidigital number, since it uses as much as digits as its factorization.

206495173120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136181 (or 1136165 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 206495173120 in words is "two hundred six billion, four hundred ninety-five million, one hundred seventy-three thousand, one hundred twenty".