1999079276544 has 459 divisors, whose sum is σ = 6743583682563. Its totient is φ = 568993775616.

The previous prime is 1999079276539. The next prime is 1999079276549. The reversal of 1999079276544 is 4456729709991.

The square root of 1999079276544 is 1413888.

It is a perfect power (a square), and thus also a powerful number.

1999079276544 is a `hidden beast` number, since 1 + 9 + 9 + 9 + 0 + 7 + 9 + 2 + 76 + 544 = 666.

It is an interprime number because it is at equal distance from previous prime (1999079276539) and next prime (1999079276549).

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

It is not an unprimeable number, because it can be changed into a prime (1999079276549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7601061757 + ... + 7601062019.

Almost surely, 2^{1999079276544} is an apocalyptic number.

1999079276544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1999079276544 is the 1413888-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999079276544

1999079276544 is an abundant number, since it is smaller than the sum of its proper divisors (4744504406019).

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

1999079276544 is an frugal number, since it uses more digits than its factorization.

1999079276544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 308629440, while the sum is 72.

The spelling of 1999079276544 in words is "one trillion, nine hundred ninety-nine billion, seventy-nine million, two hundred seventy-six thousand, five hundred forty-four".