16571378268 has 36 divisors (see below), whose sum is σ = 42513973320. Its totient is φ = 5441347296.

The previous prime is 16571378251. The next prime is 16571378323. The reversal of 16571378268 is 86287317561.

It is a happy number.

16571378268 is a `hidden beast` number, since 1 + 6 + 5 + 7 + 1 + 378 + 268 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×16571378268² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 3432783 + ... + 3437606.

Almost surely, 2^16571378268 is an apocalyptic number.

16571378268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16571378268 is an abundant number, since it is smaller than the sum of its proper divisors (25942595052).

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

16571378268 is a wasteful number, since it uses less digits than its factorization.

16571378268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6870466 (or 6870461 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 16571378268 in words is "sixteen billion, five hundred seventy-one million, three hundred seventy-eight thousand, two hundred sixty-eight".