220163625642557 has 4 divisors (see below), whose sum is σ = 220534896512700. Its totient is φ = 219792354772416.

The previous prime is 220163625642509. The next prime is 220163625642619. The reversal of 220163625642557 is 755246526361022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 192670528897561 + 27493096744996 = 13880581^2 + 5243386^2 .

It is a cyclic number.

It is not a de Polignac number, because 220163625642557 - 2²⁶ = 220163558533693 is a prime.

It is a super-2 number, since 2×220163625642557² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220163625642757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185635434182 + ... + 185635435367.

It is an arithmetic number, because the mean of its divisors is an integer number (55133724128175).

Almost surely, 2^{220163625642557} is an apocalyptic number.

It is an amenable number.

220163625642557 is a deficient number, since it is larger than the sum of its proper divisors (371270870143).

220163625642557 is an equidigital number, since it uses as much as digits as its factorization.

220163625642557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371270870142.

The product of its (nonzero) digits is 36288000, while the sum is 56.

The spelling of 220163625642557 in words is "two hundred twenty trillion, one hundred sixty-three billion, six hundred twenty-five million, six hundred forty-two thousand, five hundred fifty-seven".