16015565394 has 24 divisors (see below), whose sum is σ = 36741591900. Its totient is φ = 5024491008.

The previous prime is 16015565389. The next prime is 16015565431. The reversal of 16015565394 is 49356551061.

16015565394 is a `hidden beast` number, since 1 + 6 + 0 + 1 + 556 + 5 + 3 + 94 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 15816332169 + 199233225 = 125763^2 + 14115^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26168919 + ... + 26169530.

Almost surely, 2^16015565394 is an apocalyptic number.

16015565394 is an abundant number, since it is smaller than the sum of its proper divisors (20726026506).

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

16015565394 is a wasteful number, since it uses less digits than its factorization.

16015565394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52338474 (or 52338471 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 16015565394 in words is "sixteen billion, fifteen million, five hundred sixty-five thousand, three hundred ninety-four".