16778428278 has 32 divisors (see below), whose sum is σ = 34449795072. Its totient is φ = 5444577600.

The previous prime is 16778428253. The next prime is 16778428279. The reversal of 16778428278 is 87282487761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16778428279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40243 + ... + 187553.

It is an arithmetic number, because the mean of its divisors is an integer number (1076556096).

Almost surely, 2^16778428278 is an apocalyptic number.

16778428278 is an abundant number, since it is smaller than the sum of its proper divisors (17671366794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16778428278 is a wasteful number, since it uses less digits than its factorization.

16778428278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147820.

The product of its digits is 16859136, while the sum is 60.

The spelling of 16778428278 in words is "sixteen billion, seven hundred seventy-eight million, four hundred twenty-eight thousand, two hundred seventy-eight".