16865799597072 has 280 divisors, whose sum is σ = 49946425036704. Its totient is φ = 5513614106112.

The previous prime is 16865799597061. The next prime is 16865799597077. The reversal of 16865799597072 is 27079599756861.

16865799597072 is a `hidden beast` number, since 16 + 8 + 6 + 5 + 7 + 9 + 9 + 597 + 0 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a junction number, because it is equal to n+sod(n) for n = 16865799596982 and 16865799597000.

It is not an unprimeable number, because it can be changed into a prime (16865799597077) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 132567763 + ... + 132694925.

Almost surely, 2^{16865799597072} is an apocalyptic number.

16865799597072 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 16865799597072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24973212518352).

16865799597072 is an abundant number, since it is smaller than the sum of its proper divisors (33080625439632).

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

16865799597072 is a wasteful number, since it uses less digits than its factorization.

16865799597072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127409 (or 127388 counting only the distinct ones).

The product of its (nonzero) digits is 3600676800, while the sum is 81.

The spelling of 16865799597072 in words is "sixteen trillion, eight hundred sixty-five billion, seven hundred ninety-nine million, five hundred ninety-seven thousand, seventy-two".