16556510001552 has 160 divisors (see below), whose sum is σ = 44813223198720. Its totient is φ = 5260801728000.

The previous prime is 16556510001511. The next prime is 16556510001571. The reversal of 16556510001552 is 25510001565561.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117092977 + ... + 117234287.

It is an arithmetic number, because the mean of its divisors is an integer number (280082644992).

Almost surely, 2^{16556510001552} is an apocalyptic number.

16556510001552 is a gapful number since it is divisible by the number (12) 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 16556510001552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22406611599360).

16556510001552 is an abundant number, since it is smaller than the sum of its proper divisors (28256713197168).

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

16556510001552 is a wasteful number, since it uses less digits than its factorization.

16556510001552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142533 (or 142527 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 42.

The spelling of 16556510001552 in words is "sixteen trillion, five hundred fifty-six billion, five hundred ten million, one thousand, five hundred fifty-two".