16661201544360 has 1024 divisors, whose sum is σ = 63803013120000. Its totient is φ = 3841277313024.

The previous prime is 16661201544353. The next prime is 16661201544389. The reversal of 16661201544360 is 6344510216661.

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

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1787102659 + ... + 1787111981.

It is an arithmetic number, because the mean of its divisors is an integer number (62307630000).

Almost surely, 2^{16661201544360} is an apocalyptic number.

16661201544360 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 16661201544360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31901506560000).

16661201544360 is an abundant number, since it is smaller than the sum of its proper divisors (47141811575640).

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

16661201544360 is a wasteful number, since it uses less digits than its factorization.

16661201544360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9535 (or 9525 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 16661201544360 in words is "sixteen trillion, six hundred sixty-one billion, two hundred one million, five hundred forty-four thousand, three hundred sixty".