9976449371850 has 144 divisors (see below), whose sum is σ = 30563146380312. Its totient is φ = 2311285985280.

The previous prime is 9976449371789. The next prime is 9976449371857. The reversal of 9976449371850 is 581739446799.

9976449371850 is a `hidden beast` number, since 9 + 9 + 7 + 64 + 493 + 71 + 8 + 5 + 0 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 143928009 + 9976305443841 = 11997^2 + 3158529^2 .

It is not an unprimeable number, because it can be changed into a prime (9976449371857) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 50058667 + ... + 50257566.

Almost surely, 2^{9976449371850} is an apocalyptic number.

9976449371850 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9976449371850 is an abundant number, since it is smaller than the sum of its proper divisors (20586697008462).

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

9976449371850 is a wasteful number, since it uses less digits than its factorization.

9976449371850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100316281 (or 100316273 counting only the distinct ones).

The product of its (nonzero) digits is 411505920, while the sum is 72.

The spelling of 9976449371850 in words is "nine trillion, nine hundred seventy-six billion, four hundred forty-nine million, three hundred seventy-one thousand, eight hundred fifty".