16778428347 has 8 divisors (see below), whose sum is σ = 22471558144. Its totient is φ = 11135458728.

The previous prime is 16778428333. The next prime is 16778428357. The reversal of 16778428347 is 74382487761.

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

It is not a de Polignac number, because 16778428347 - 2¹⁸ = 16778166203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16778428357) 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, 12539263 + ... + 12540600.

It is an arithmetic number, because the mean of its divisors is an integer number (2808944768).

Almost surely, 2^16778428347 is an apocalyptic number.

16778428347 is a deficient number, since it is larger than the sum of its proper divisors (5693129797).

16778428347 is a wasteful number, since it uses less digits than its factorization.

16778428347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25080089.

The product of its digits is 12644352, while the sum is 57.

The spelling of 16778428347 in words is "sixteen billion, seven hundred seventy-eight million, four hundred twenty-eight thousand, three hundred forty-seven".