16390278426 has 32 divisors (see below), whose sum is σ = 34127736768. Its totient is φ = 5242942080.

The previous prime is 16390278409. The next prime is 16390278439. The reversal of 16390278426 is 62487209361.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 489480 + ... + 521891.

It is an arithmetic number, because the mean of its divisors is an integer number (1066491774).

Almost surely, 2^16390278426 is an apocalyptic number.

16390278426 is an abundant number, since it is smaller than the sum of its proper divisors (17737458342).

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

16390278426 is a wasteful number, since it uses less digits than its factorization.

16390278426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011486.

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 16390278426 in words is "sixteen billion, three hundred ninety million, two hundred seventy-eight thousand, four hundred twenty-six".