16621255521102 has 32 divisors (see below), whose sum is σ = 35198210575872. Its totient is φ = 5214473357184.

The previous prime is 16621255521083. The next prime is 16621255521151. The reversal of 16621255521102 is 20112555212661.

It is a happy number.

It is a super-2 number, since 2×16621255521102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15529473 + ... + 16565235.

It is an arithmetic number, because the mean of its divisors is an integer number (1099944080496).

Almost surely, 2^{16621255521102} is an apocalyptic number.

16621255521102 is an abundant number, since it is smaller than the sum of its proper divisors (18576955054770).

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

16621255521102 is a wasteful number, since it uses less digits than its factorization.

16621255521102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193112.

The product of its (nonzero) digits is 72000, while the sum is 39.

The spelling of 16621255521102 in words is "sixteen trillion, six hundred twenty-one billion, two hundred fifty-five million, five hundred twenty-one thousand, one hundred two".