220779026813 has 4 divisors (see below), whose sum is σ = 220864635840. Its totient is φ = 220693417788.

The previous prime is 220779026773. The next prime is 220779026861. The reversal of 220779026813 is 318620977022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220779026813 - 2⁶ = 220779026749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220779026893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42800645 + ... + 42805802.

It is an arithmetic number, because the mean of its divisors is an integer number (55216158960).

Almost surely, 2^220779026813 is an apocalyptic number.

It is an amenable number.

220779026813 is a deficient number, since it is larger than the sum of its proper divisors (85609027).

220779026813 is an equidigital number, since it uses as much as digits as its factorization.

220779026813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85609026.

The product of its (nonzero) digits is 508032, while the sum is 47.

The spelling of 220779026813 in words is "two hundred twenty billion, seven hundred seventy-nine million, twenty-six thousand, eight hundred thirteen".