16520020352544 has 48 divisors (see below), whose sum is σ = 43365341628000. Its totient is φ = 5506636853760.

The previous prime is 16520020352489. The next prime is 16520020352551. The reversal of 16520020352544 is 44525302002561.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×16520020352544² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16629199 + ... + 17594609.

It is an arithmetic number, because the mean of its divisors is an integer number (903444617250).

Almost surely, 2^{16520020352544} is an apocalyptic number.

It is an amenable number.

16520020352544 is an abundant number, since it is smaller than the sum of its proper divisors (26845321275456).

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

16520020352544 is a wasteful number, since it uses less digits than its factorization.

16520020352544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143673 (or 1143665 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The spelling of 16520020352544 in words is "sixteen trillion, five hundred twenty billion, twenty million, three hundred fifty-two thousand, five hundred forty-four".