999381861360 has 120 divisors (see below), whose sum is σ = 3464523863424. Its totient is φ = 257904990720.

The previous prime is 999381861343. The next prime is 999381861367. The reversal of 999381861360 is 63168183999.

999381861360 is a `hidden beast` number, since 9 + 9 + 9 + 3 + 8 + 1 + 8 + 613 + 6 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×999381861360² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999381861367) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22365267 + ... + 22409906.

Almost surely, 2^999381861360 is an apocalyptic number.

999381861360 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

999381861360 is an abundant number, since it is smaller than the sum of its proper divisors (2465142002064).

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

999381861360 is a wasteful number, since it uses less digits than its factorization.

999381861360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44775223 (or 44775214 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 63.

The spelling of 999381861360 in words is "nine hundred ninety-nine billion, three hundred eighty-one million, eight hundred sixty-one thousand, three hundred sixty".