1999579236480 has 1536 divisors, whose sum is σ = 8509463424000. Its totient is φ = 442191052800.

The previous prime is 1999579236469. The next prime is 1999579236481. The reversal of 1999579236480 is 846329759991.

1999579236480 is a `hidden beast` number, since 1 + 9 + 9 + 9 + 57 + 92 + 3 + 6 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 1999579236399 and 1999579236408.

It is not an unprimeable number, because it can be changed into a prime (1999579236481) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 8297009160 + ... + 8297009400.

It is an arithmetic number, because the mean of its divisors is an integer number (5540015250).

It is a 2-persistent number, because it is pandigital, and so is 2⋅1999579236480 = 3999158472960, but 3⋅1999579236480 = 5998737709440 is not.

Almost surely, 2^{1999579236480} is an apocalyptic number.

1999579236480 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 1999579236480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4254731712000).

1999579236480 is an abundant number, since it is smaller than the sum of its proper divisors (6509884187520).

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

1999579236480 is a wasteful number, since it uses less digits than its factorization.

1999579236480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 264539520, while the sum is 72.

The spelling of 1999579236480 in words is "one trillion, nine hundred ninety-nine billion, five hundred seventy-nine million, two hundred thirty-six thousand, four hundred eighty".