9945849774 has 24 divisors (see below), whose sum is σ = 23139324648. Its totient is φ = 2841671280.

The previous prime is 9945849751. The next prime is 9945849811. The reversal of 9945849774 is 4779485499.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16914417 + ... + 16915004.

It is an arithmetic number, because the mean of its divisors is an integer number (964138527).

Almost surely, 2^9945849774 is an apocalyptic number.

9945849774 is an abundant number, since it is smaller than the sum of its proper divisors (13193474874).

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

9945849774 is a wasteful number, since it uses less digits than its factorization.

9945849774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33829440 (or 33829433 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 66.

The square root of 9945849774 is about 99728.8813433701. The cubic root of 9945849774 is about 2150.5388787327.

The spelling of 9945849774 in words is "nine billion, nine hundred forty-five million, eight hundred forty-nine thousand, seven hundred seventy-four".