16621185222072 has 48 divisors (see below), whose sum is σ = 45039821594040. Its totient is φ = 5537427490368.

The previous prime is 16621185222071. The next prime is 16621185222121. The reversal of 16621185222072 is 27022258112661.

16621185222072 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 118 + 522 + 2 + 0 + 7 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16621185222071) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61689303 + ... + 61958150.

Almost surely, 2^{16621185222072} is an apocalyptic number.

16621185222072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16621185222072 is an abundant number, since it is smaller than the sum of its proper divisors (28418636371968).

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

16621185222072 is a wasteful number, since it uses less digits than its factorization.

16621185222072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123649332 (or 123649325 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 16621185222072 in words is "sixteen trillion, six hundred twenty-one billion, one hundred eighty-five million, two hundred twenty-two thousand, seventy-two".