16500061661634 has 48 divisors (see below), whose sum is σ = 35988317015040. Its totient is φ = 5463379843200.

The previous prime is 16500061661621. The next prime is 16500061661651. The reversal of 16500061661634 is 43616616000561.

16500061661634 is a `hidden beast` number, since 1 + 6 + 5 + 0 + 0 + 0 + 6 + 1 + 6 + 6 + 1 + 634 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16500061661634.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77647722 + ... + 77859930.

It is an arithmetic number, because the mean of its divisors is an integer number (749756604480).

Almost surely, 2^{16500061661634} is an apocalyptic number.

16500061661634 is an abundant number, since it is smaller than the sum of its proper divisors (19488255353406).

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

16500061661634 is a wasteful number, since it uses less digits than its factorization.

16500061661634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240975 (or 240972 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 16500061661634 in words is "sixteen trillion, five hundred billion, sixty-one million, six hundred sixty-one thousand, six hundred thirty-four".