1999792517472 has 240 divisors, whose sum is σ = 6003074080080. Its totient is φ = 652939702272.

The previous prime is 1999792517467. The next prime is 1999792517483. The reversal of 1999792517472 is 2747152979991.

1999792517472 is a `hidden beast` number, since 19 + 9 + 9 + 7 + 92 + 51 + 7 + 472 = 666.

It is a super-2 number, since 2×1999792517472² (a number of 25 digits) contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1999792517472.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 24643108 + ... + 24724124.

It is an arithmetic number, because the mean of its divisors is an integer number (25012808667).

Almost surely, 2^{1999792517472} is an apocalyptic number.

1999792517472 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 1999792517472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3001537040040).

1999792517472 is an abundant number, since it is smaller than the sum of its proper divisors (4003281562608).

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

1999792517472 is a wasteful number, since it uses less digits than its factorization.

1999792517472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81235 (or 81218 counting only the distinct ones).

The product of its digits is 180033840, while the sum is 72.

The spelling of 1999792517472 in words is "one trillion, nine hundred ninety-nine billion, seven hundred ninety-two million, five hundred seventeen thousand, four hundred seventy-two".