447798997464 has 256 divisors, whose sum is σ = 1405390694400. Its totient is φ = 115744591872.

The previous prime is 447798997463. The next prime is 447798997511. The reversal of 447798997464 is 464799897744.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a self number, because there is not a number n which added to its sum of digits gives 447798997464.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447798997463) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 150823372 + ... + 150826340.

It is an arithmetic number, because the mean of its divisors is an integer number (5489807400).

Almost surely, 2^447798997464 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 447798997464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (702695347200).

447798997464 is an abundant number, since it is smaller than the sum of its proper divisors (957591696936).

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

447798997464 is a wasteful number, since it uses less digits than its factorization.

447798997464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4354 (or 4350 counting only the distinct ones).

The product of its digits is 3072577536, while the sum is 78.

The spelling of 447798997464 in words is "four hundred forty-seven billion, seven hundred ninety-eight million, nine hundred ninety-seven thousand, four hundred sixty-four".