16220542045 has 4 divisors (see below), whose sum is σ = 19464650460. Its totient is φ = 12976433632.

The previous prime is 16220542007. The next prime is 16220542067. The reversal of 16220542045 is 54024502261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6892652484 + 9327889561 = 83022^2 + 96581^2 .

It is a cyclic number.

It is not a de Polignac number, because 16220542045 - 2⁷ = 16220541917 is a prime.

It is a super-2 number, since 2×16220542045² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16220541998 and 16220542016.

It is a congruent number.

It is an unprimeable number.

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, 1622054200 + ... + 1622054209.

It is an arithmetic number, because the mean of its divisors is an integer number (4866162615).

Almost surely, 2^16220542045 is an apocalyptic number.

It is an amenable number.

16220542045 is a deficient number, since it is larger than the sum of its proper divisors (3244108415).

16220542045 is an equidigital number, since it uses as much as digits as its factorization.

16220542045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244108414.

The product of its (nonzero) digits is 19200, while the sum is 31.

The spelling of 16220542045 in words is "sixteen billion, two hundred twenty million, five hundred forty-two thousand, forty-five".