16556470272 has 312 divisors, whose sum is σ = 52440747840. Its totient is φ = 5009571840.

The previous prime is 16556470261. The next prime is 16556470277. The reversal of 16556470272 is 27207465561.

16556470272 is a `hidden beast` number, since 1 + 6 + 556 + 4 + 70 + 27 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (16556470277) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18173497 + ... + 18174407.

It is an arithmetic number, because the mean of its divisors is an integer number (168079320).

Almost surely, 2^16556470272 is an apocalyptic number.

16556470272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16556470272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26220373920).

16556470272 is an abundant number, since it is smaller than the sum of its proper divisors (35884277568).

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

16556470272 is a wasteful number, since it uses less digits than its factorization.

16556470272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 962 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 16556470272 in words is "sixteen billion, five hundred fifty-six million, four hundred seventy thousand, two hundred seventy-two".