7991690273280 has 1200 divisors, whose sum is σ = 34752110918976. Its totient is φ = 1719130521600.

The previous prime is 7991690273261. The next prime is 7991690273291. The reversal of 7991690273280 is 823720961997.

7991690273280 is a `hidden beast` number, since 79 + 9 + 16 + 9 + 0 + 273 + 280 = 666.

It is a super-2 number, since 2×7991690273280² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 419479755 + ... + 419498805.

Almost surely, 2^{7991690273280} is an apocalyptic number.

7991690273280 is a gapful number since it is divisible by the number (70) 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 7991690273280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17376055459488).

7991690273280 is an abundant number, since it is smaller than the sum of its proper divisors (26760420645696).

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

7991690273280 is a wasteful number, since it uses less digits than its factorization.

7991690273280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19127 (or 19085 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 63.

The spelling of 7991690273280 in words is "seven trillion, nine hundred ninety-one billion, six hundred ninety million, two hundred seventy-three thousand, two hundred eighty".