16550121001600 has 48 divisors (see below), whose sum is σ = 40883970794670. Its totient is φ = 6620048399360.

The previous prime is 16550121001597. The next prime is 16550121001621. The reversal of 16550121001600 is 610012105561.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 11204444068416 + 5345676933184 = 3347304^2 + 2312072^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2585953207 + ... + 2585959606.

Almost surely, 2^{16550121001600} is an apocalyptic number.

16550121001600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16550121001600 is an abundant number, since it is smaller than the sum of its proper divisors (24333849793070).

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

16550121001600 is an equidigital number, since it uses as much as digits as its factorization.

16550121001600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171912837 (or 5171912820 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 16550121001600 in words is "sixteen trillion, five hundred fifty billion, one hundred twenty-one million, one thousand, six hundred".