16552251555840 has 4080 divisors, whose sum is σ = 82010579444640. Its totient is φ = 3139184885760.

The previous prime is 16552251555649. The next prime is 16552251555877. The reversal of 16552251555840 is 4855515225561.

16552251555840 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 2 + 2 + 5 + 1 + 55 + 584 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 185980354516 + ... + 185980354604.

Almost surely, 2^{16552251555840} is an apocalyptic number.

16552251555840 is a gapful number since it is divisible by the number (10) 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 16552251555840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41005289722320).

16552251555840 is an abundant number, since it is smaller than the sum of its proper divisors (65458327888800).

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

16552251555840 is an equidigital number, since it uses as much as digits as its factorization.

16552251555840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 12000000, while the sum is 54.

The spelling of 16552251555840 in words is "sixteen trillion, five hundred fifty-two billion, two hundred fifty-one million, five hundred fifty-five thousand, eight hundred forty".