7447891994880 has 1152 divisors, whose sum is σ = 26998538649600. Its totient is φ = 1741425868800.

The previous prime is 7447891994773. The next prime is 7447891994887. The reversal of 7447891994880 is 884991987447.

It is a junction number, because it is equal to n+sod(n) for n = 7447891994796 and 7447891994805.

It is not an unprimeable number, because it can be changed into a prime (7447891994887) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5104791591 + ... + 5104793049.

Almost surely, 2^{7447891994880} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7447891994880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13499269324800).

7447891994880 is an abundant number, since it is smaller than the sum of its proper divisors (19550646654720).

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

7447891994880 is a wasteful number, since it uses less digits than its factorization.

7447891994880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1617 counting only the distinct ones).

The product of its (nonzero) digits is 1170505728, while the sum is 78.

The spelling of 7447891994880 in words is "seven trillion, four hundred forty-seven billion, eight hundred ninety-one million, nine hundred ninety-four thousand, eight hundred eighty".