16555170720 has 96 divisors (see below), whose sum is σ = 56889604800. Its totient is φ = 4013373440.

The previous prime is 16555170661. The next prime is 16555170727. The reversal of 16555170720 is 2707155561.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (16555170727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1562445 + ... + 1573004.

It is an arithmetic number, because the mean of its divisors is an integer number (592600050).

Almost surely, 2^16555170720 is an apocalyptic number.

16555170720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16555170720 is an abundant number, since it is smaller than the sum of its proper divisors (40334434080).

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

16555170720 is a wasteful number, since it uses less digits than its factorization.

16555170720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3135478 (or 3135470 counting only the distinct ones).

The product of its (nonzero) digits is 73500, while the sum is 39.

The spelling of 16555170720 in words is "sixteen billion, five hundred fifty-five million, one hundred seventy thousand, seven hundred twenty".