220740354838581 has 4 divisors (see below), whose sum is σ = 294320473118112. Its totient is φ = 147160236559052.

The previous prime is 220740354838573. The next prime is 220740354838639. The reversal of 220740354838581 is 185838453047022.

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 220740354838581 - 2³ = 220740354838573 is a prime.

It is a super-2 number, since 2×220740354838581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220740354838541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36790059139761 + ... + 36790059139766.

It is an arithmetic number, because the mean of its divisors is an integer number (73580118279528).

Almost surely, 2^{220740354838581} is an apocalyptic number.

It is an amenable number.

220740354838581 is a deficient number, since it is larger than the sum of its proper divisors (73580118279531).

220740354838581 is an equidigital number, since it uses as much as digits as its factorization.

220740354838581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73580118279530.

The product of its (nonzero) digits is 51609600, while the sum is 60.

The spelling of 220740354838581 in words is "two hundred twenty trillion, seven hundred forty billion, three hundred fifty-four million, eight hundred thirty-eight thousand, five hundred eighty-one".