220816257423605 has 4 divisors (see below), whose sum is σ = 264979508908332. Its totient is φ = 176653005938880.

The previous prime is 220816257423589. The next prime is 220816257423613. The reversal of 220816257423605 is 506324752618022.

220816257423605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 131573150245156 + 89243107178449 = 11470534^2 + 9446857^2 .

It is not a de Polignac number, because 220816257423605 - 2⁴ = 220816257423589 is a prime.

It is a super-2 number, since 2×220816257423605² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22081625742356 + ... + 22081625742365.

It is an arithmetic number, because the mean of its divisors is an integer number (66244877227083).

Almost surely, 2^{220816257423605} is an apocalyptic number.

It is an amenable number.

220816257423605 is a deficient number, since it is larger than the sum of its proper divisors (44163251484727).

220816257423605 is an equidigital number, since it uses as much as digits as its factorization.

220816257423605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44163251484726.

The product of its (nonzero) digits is 9676800, while the sum is 53.

The spelling of 220816257423605 in words is "two hundred twenty trillion, eight hundred sixteen billion, two hundred fifty-seven million, four hundred twenty-three thousand, six hundred five".