9945973170 has 96 divisors (see below), whose sum is σ = 29575383552. Its totient is φ = 2271701376.

The previous prime is 9945973153. The next prime is 9945973171. The reversal of 9945973170 is 713795499.

It is a happy number.

9945973170 is a `hidden beast` number, since 99 + 459 + 7 + 31 + 70 = 666.

It is not an unprimeable number, because it can be changed into a prime (9945973171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 992304 + ... + 1002276.

It is an arithmetic number, because the mean of its divisors is an integer number (308076912).

Almost surely, 2^9945973170 is an apocalyptic number.

9945973170 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a pronic number, being equal to 99729×99730.

It is a practical number, because each smaller number is the sum of distinct divisors of 9945973170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14787691776).

9945973170 is an abundant number, since it is smaller than the sum of its proper divisors (19629410382).

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

9945973170 is a wasteful number, since it uses less digits than its factorization.

9945973170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11576 (or 11573 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The square root of 9945973170 is about 99729.4999987466. The cubic root of 9945973170 is about 2150.5477724524.

The spelling of 9945973170 in words is "nine billion, nine hundred forty-five million, nine hundred seventy-three thousand, one hundred seventy".