9977799744 has 168 divisors, whose sum is σ = 31409152320. Its totient is φ = 3003264000.

The previous prime is 9977799719. The next prime is 9977799781. The reversal of 9977799744 is 4479977799.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 951522 + ... + 961950.

It is an arithmetic number, because the mean of its divisors is an integer number (186959240).

Almost surely, 2^9977799744 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 9977799744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15704576160).

9977799744 is an abundant number, since it is smaller than the sum of its proper divisors (21431352576).

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

9977799744 is a wasteful number, since it uses less digits than its factorization.

9977799744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10609 (or 10596 counting only the distinct ones).

The product of its digits is 252047376, while the sum is 72.

The square root of 9977799744 is about 99888.9370451002. The cubic root of 9977799744 is about 2152.8392087239.

The spelling of 9977799744 in words is "nine billion, nine hundred seventy-seven million, seven hundred ninety-nine thousand, seven hundred forty-four".