16550121335172 has 24 divisors (see below), whose sum is σ = 38617256839392. Its totient is φ = 5516663246400.

The previous prime is 16550121335123. The next prime is 16550121335183. The reversal of 16550121335172 is 27153312105561.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3892654 + ... + 6946437.

It is an arithmetic number, because the mean of its divisors is an integer number (1609052368308).

Almost surely, 2^{16550121335172} is an apocalyptic number.

16550121335172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16550121335172 is an abundant number, since it is smaller than the sum of its proper divisors (22067135504220).

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

16550121335172 is a wasteful number, since it uses less digits than its factorization.

16550121335172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10966339 (or 10966337 counting only the distinct ones).

The product of its (nonzero) digits is 189000, while the sum is 42.

The spelling of 16550121335172 in words is "sixteen trillion, five hundred fifty billion, one hundred twenty-one million, three hundred thirty-five thousand, one hundred seventy-two".