220464545463991 has 2 divisors, whose sum is σ = 220464545463992. Its totient is φ = 220464545463990.

The previous prime is 220464545463961. The next prime is 220464545464027. The reversal of 220464545463991 is 199364545464022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220464545463991 - 2¹¹ = 220464545461943 is a prime.

It is a super-2 number, since 2×220464545463991² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220464545463931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110232272731995 + 110232272731996.

It is an arithmetic number, because the mean of its divisors is an integer number (110232272731996).

Almost surely, 2^{220464545463991} is an apocalyptic number.

220464545463991 is a deficient number, since it is larger than the sum of its proper divisors (1).

220464545463991 is an equidigital number, since it uses as much as digits as its factorization.

220464545463991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 223948800, while the sum is 64.

The spelling of 220464545463991 in words is "two hundred twenty trillion, four hundred sixty-four billion, five hundred forty-five million, four hundred sixty-three thousand, nine hundred ninety-one".