16136440668 has 36 divisors (see below), whose sum is σ = 40796873208. Its totient is φ = 5377819680.

The previous prime is 16136440609. The next prime is 16136440679. The reversal of 16136440668 is 86604463161.

16136440668 is a `hidden beast` number, since 16 + 136 + 440 + 6 + 68 = 666.

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

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, 171055 + ... + 248057.

It is an arithmetic number, because the mean of its divisors is an integer number (1133246478).

Almost surely, 2^16136440668 is an apocalyptic number.

16136440668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16136440668 is an abundant number, since it is smaller than the sum of its proper divisors (24660432540).

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

16136440668 is a wasteful number, since it uses less digits than its factorization.

16136440668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82834 (or 82829 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 16136440668 in words is "sixteen billion, one hundred thirty-six million, four hundred forty thousand, six hundred sixty-eight".