16506146556 has 36 divisors (see below), whose sum is σ = 42252028000. Its totient is φ = 5432401728.

The previous prime is 16506146537. The next prime is 16506146557. The reversal of 16506146556 is 65564160561.

16506146556 is a `hidden beast` number, since 1 + 6 + 50 + 6 + 1 + 46 + 556 = 666.

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

It is a super-2 number, since 2×16506146556² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16506146557) 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, 2899081 + ... + 2904768.

Almost surely, 2^16506146556 is an apocalyptic number.

It is an amenable number.

16506146556 is an abundant number, since it is smaller than the sum of its proper divisors (25745881444).

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

16506146556 is a wasteful number, since it uses less digits than its factorization.

16506146556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5803938 (or 5803933 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 16506146556 in words is "sixteen billion, five hundred six million, one hundred forty-six thousand, five hundred fifty-six".