16577221111 has 8 divisors (see below), whose sum is σ = 18573004944. Its totient is φ = 14662897920.

The previous prime is 16577221081. The next prime is 16577221183. The reversal of 16577221111 is 11112277561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16577221111 - 2¹³ = 16577212919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16577221211) 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 7 ways as a sum of consecutive naturals, for example, 20364730 + ... + 20365543.

It is an arithmetic number, because the mean of its divisors is an integer number (2321625618).

Almost surely, 2^16577221111 is an apocalyptic number.

16577221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16577221111 is a deficient number, since it is larger than the sum of its proper divisors (1995783833).

16577221111 is a wasteful number, since it uses less digits than its factorization.

16577221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40730321.

The product of its digits is 5880, while the sum is 34.

Adding to 16577221111 its reverse (11112277561), we get a palindrome (27689498672).

The spelling of 16577221111 in words is "sixteen billion, five hundred seventy-seven million, two hundred twenty-one thousand, one hundred eleven".