220816009457 has 2 divisors, whose sum is σ = 220816009458. Its totient is φ = 220816009456.

The previous prime is 220816009399. The next prime is 220816009471. The reversal of 220816009457 is 754900618022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187572145216 + 33243864241 = 433096^2 + 182329^2 .

It is a cyclic number.

It is not a de Polignac number, because 220816009457 - 2¹⁰ = 220816008433 is a prime.

It is a super-5 number, since 5×220816009457⁵ (a number of 58 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (220816069457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110408004728 + 110408004729.

It is an arithmetic number, because the mean of its divisors is an integer number (110408004729).

Almost surely, 2^220816009457 is an apocalyptic number.

It is an amenable number.

220816009457 is a deficient number, since it is larger than the sum of its proper divisors (1).

220816009457 is an equidigital number, since it uses as much as digits as its factorization.

220816009457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 220816009457 in words is "two hundred twenty billion, eight hundred sixteen million, nine thousand, four hundred fifty-seven".