16001335603044 has 144 divisors (see below), whose sum is σ = 46995885483456. Its totient is φ = 4717838390400.

The previous prime is 16001335603031. The next prime is 16001335603051. The reversal of 16001335603044 is 44030653310061.

16001335603044 is a `hidden beast` number, since 1 + 6 + 0 + 0 + 1 + 3 + 3 + 5 + 603 + 0 + 44 = 666.

It is a super-2 number, since 2×16001335603044² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19828327 + ... + 20619534.

Almost surely, 2^{16001335603044} is an apocalyptic number.

It is an amenable number.

16001335603044 is an abundant number, since it is smaller than the sum of its proper divisors (30994549880412).

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

16001335603044 is a wasteful number, since it uses less digits than its factorization.

16001335603044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40447928 (or 40447914 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 16001335603044 in words is "sixteen trillion, one billion, three hundred thirty-five million, six hundred three thousand, forty-four".