16493645824520 has 32 divisors (see below), whose sum is σ = 37116138000600. Its totient is φ = 6596492126208.

The previous prime is 16493645824519. The next prime is 16493645824561. The reversal of 16493645824520 is 2542854639461.

It can be written as a sum of positive squares in 4 ways, for example, as 9669649475236 + 6823996349284 = 3109606^2 + 2612278^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16493645824520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29917289 + ... + 30463608.

Almost surely, 2^{16493645824520} is an apocalyptic number.

16493645824520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16493645824520 is an abundant number, since it is smaller than the sum of its proper divisors (20622492176080).

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

16493645824520 is a wasteful number, since it uses less digits than its factorization.

16493645824520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60387737 (or 60387733 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 59.

The spelling of 16493645824520 in words is "sixteen trillion, four hundred ninety-three billion, six hundred forty-five million, eight hundred twenty-four thousand, five hundred twenty".