16556037120 has 528 divisors, whose sum is σ = 68025379968. Its totient is φ = 3782246400.

The previous prime is 16556037089. The next prime is 16556037143. The reversal of 16556037120 is 2173065561.

16556037120 is a `hidden beast` number, since 1 + 6 + 5 + 560 + 3 + 71 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8708170 + ... + 8710070.

Almost surely, 2^16556037120 is an apocalyptic number.

16556037120 is a gapful number since it is divisible by the number (10) 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 16556037120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34012689984).

16556037120 is an abundant number, since it is smaller than the sum of its proper divisors (51469342848).

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

16556037120 is an equidigital number, since it uses as much as digits as its factorization.

16556037120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948 (or 1918 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The spelling of 16556037120 in words is "sixteen billion, five hundred fifty-six million, thirty-seven thousand, one hundred twenty".