16220505549 has 8 divisors (see below), whose sum is σ = 21652698592. Its totient is φ = 10800991440.

The previous prime is 16220505541. The next prime is 16220505551. The reversal of 16220505549 is 94550502261.

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

It is not a de Polignac number, because 16220505549 - 2³ = 16220505541 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 (16220505541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3166747 + ... + 3171864.

It is an arithmetic number, because the mean of its divisors is an integer number (2706587324).

Almost surely, 2^16220505549 is an apocalyptic number.

It is an amenable number.

16220505549 is a deficient number, since it is larger than the sum of its proper divisors (5432193043).

16220505549 is an equidigital number, since it uses as much as digits as its factorization.

16220505549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6339467.

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 16220505549 in words is "sixteen billion, two hundred twenty million, five hundred five thousand, five hundred forty-nine".