16228778619 has 8 divisors (see below), whose sum is σ = 21663565120. Its totient is φ = 10806588936.

The previous prime is 16228778591. The next prime is 16228778627. The reversal of 16228778619 is 91687782261.

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

It is not a de Polignac number, because 16228778619 - 2²¹ = 16226681467 is a prime.

It is a super-2 number, since 2×16228778619² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16228778519) 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, 3146197 + ... + 3151350.

It is an arithmetic number, because the mean of its divisors is an integer number (2707945640).

Almost surely, 2^16228778619 is an apocalyptic number.

16228778619 is a deficient number, since it is larger than the sum of its proper divisors (5434786501).

16228778619 is an equidigital number, since it uses as much as digits as its factorization.

16228778619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6298409.

The product of its digits is 4064256, while the sum is 57.

The spelling of 16228778619 in words is "sixteen billion, two hundred twenty-eight million, seven hundred seventy-eight thousand, six hundred nineteen".