220499999999991 has 24 divisors (see below), whose sum is σ = 318630654688320. Its totient is φ = 146939703054336.

The previous prime is 220499999999989. The next prime is 220500000000031. The reversal of 220499999999991 is 199999999994022.

It is not a de Polignac number, because 220499999999991 - 2¹ = 220499999999989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220499999999892 and 220499999999901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220499999999291) 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 23 ways as a sum of consecutive naturals, for example, 536927551 + ... + 537338063.

It is an arithmetic number, because the mean of its divisors is an integer number (13276277278680).

Almost surely, 2^{220499999999991} is an apocalyptic number.

220499999999991 is a deficient number, since it is larger than the sum of its proper divisors (98130654688329).

220499999999991 is a wasteful number, since it uses less digits than its factorization.

220499999999991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434855 (or 434852 counting only the distinct ones).

The product of its (nonzero) digits is 55788550416, while the sum is 99.

The spelling of 220499999999991 in words is "two hundred twenty trillion, four hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".