16621253533260 has 72 divisors (see below), whose sum is σ = 53071370941680. Its totient is φ = 4199053523328.

The previous prime is 16621253533219. The next prime is 16621253533289. The reversal of 16621253533260 is 6233535212661.

16621253533260 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 1 + 2 + 53 + 533 + 2 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 2430004407 + ... + 2430011246.

It is an arithmetic number, because the mean of its divisors is an integer number (737102374190).

Almost surely, 2^{16621253533260} is an apocalyptic number.

16621253533260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16621253533260 is an abundant number, since it is smaller than the sum of its proper divisors (36450117408420).

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

16621253533260 is a wasteful number, since it uses less digits than its factorization.

16621253533260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4860015687 (or 4860015682 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The spelling of 16621253533260 in words is "sixteen trillion, six hundred twenty-one billion, two hundred fifty-three million, five hundred thirty-three thousand, two hundred sixty".