9945705977896 has 64 divisors (see below), whose sum is σ = 20113453543680. Its totient is φ = 4583294526720.

The previous prime is 9945705977881. The next prime is 9945705977923. The reversal of 9945705977896 is 6987795075499.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 293012286 + ... + 293046226.

It is an arithmetic number, because the mean of its divisors is an integer number (314272711620).

Almost surely, 2^{9945705977896} is an apocalyptic number.

It is an amenable number.

9945705977896 is an abundant number, since it is smaller than the sum of its proper divisors (10167747565784).

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

9945705977896 is a wasteful number, since it uses less digits than its factorization.

9945705977896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38194 (or 38190 counting only the distinct ones).

The product of its (nonzero) digits is 10802030400, while the sum is 85.

The spelling of 9945705977896 in words is "nine trillion, nine hundred forty-five billion, seven hundred five million, nine hundred seventy-seven thousand, eight hundred ninety-six".