16556021614404 has 36 divisors (see below), whose sum is σ = 41939558007984. Its totient is φ = 5506856577072.

The previous prime is 16556021614403. The next prime is 16556021614541. The reversal of 16556021614404 is 40441612065561.

16556021614404 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 6 + 0 + 21 + 614 + 4 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×16556021614404² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16556021614404.

It is not an unprimeable number, because it can be changed into a prime (16556021614403) 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, 492370222 + ... + 492403845.

It is an arithmetic number, because the mean of its divisors is an integer number (1164987722444).

Almost surely, 2^{16556021614404} is an apocalyptic number.

It is an amenable number.

16556021614404 is an abundant number, since it is smaller than the sum of its proper divisors (25383536393580).

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

16556021614404 is a wasteful number, since it uses less digits than its factorization.

16556021614404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984774544 (or 984774539 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

Adding to 16556021614404 its reverse (40441612065561), we get a palindrome (56997633679965).

The spelling of 16556021614404 in words is "sixteen trillion, five hundred fifty-six billion, twenty-one million, six hundred fourteen thousand, four hundred four".