16551165240450 has 36 divisors (see below), whose sum is σ = 44467463947218. Its totient is φ = 4413644064000.

The previous prime is 16551165240439. The next prime is 16551165240497. The reversal of 16551165240450 is 5404256115561.

16551165240450 is a `hidden beast` number, since 1 + 6 + 5 + 5 + 116 + 524 + 0 + 4 + 5 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 15685187965209 + 865977275241 = 3960453^2 + 930579^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 16551165240396 and 16551165240405.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 18390183151 + ... + 18390184050.

Almost surely, 2^{16551165240450} is an apocalyptic number.

16551165240450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16551165240450 is an abundant number, since it is smaller than the sum of its proper divisors (27916298706768).

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

16551165240450 is a wasteful number, since it uses less digits than its factorization.

16551165240450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36780367219 (or 36780367211 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

The spelling of 16551165240450 in words is "sixteen trillion, five hundred fifty-one billion, one hundred sixty-five million, two hundred forty thousand, four hundred fifty".