16555001056 has 72 divisors (see below), whose sum is σ = 36097673976. Its totient is φ = 7411979520.

The previous prime is 16555001041. The next prime is 16555001069. The reversal of 16555001056 is 65010055561.

It is a super-2 number, since 2×16555001056² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1574890 + ... + 1585366.

It is an arithmetic number, because the mean of its divisors is an integer number (501356583).

Almost surely, 2^16555001056 is an apocalyptic number.

16555001056 is a gapful number since it is divisible by the number (16) 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 16555001056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18048836988).

16555001056 is an abundant number, since it is smaller than the sum of its proper divisors (19542672920).

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

16555001056 is a wasteful number, since it uses less digits than its factorization.

16555001056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10632 (or 10557 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 16555001056 in words is "sixteen billion, five hundred fifty-five million, one thousand, fifty-six".