16221463461556 has 12 divisors (see below), whose sum is σ = 28388663795968. Its totient is φ = 8110416662712.

The previous prime is 16221463461503. The next prime is 16221463461557. The reversal of 16221463461556 is 65516436412261.

16221463461556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16221463461556² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16221463461557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78651156 + ... + 78857131.

Almost surely, 2^{16221463461556} is an apocalyptic number.

It is an amenable number.

16221463461556 is a deficient number, since it is larger than the sum of its proper divisors (12167200334412).

16221463461556 is a wasteful number, since it uses less digits than its factorization.

16221463461556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157534038 (or 157534036 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 52.

The spelling of 16221463461556 in words is "sixteen trillion, two hundred twenty-one billion, four hundred sixty-three million, four hundred sixty-one thousand, five hundred fifty-six".