9969845972 has 24 divisors (see below), whose sum is σ = 18215901312. Its totient is φ = 4765543200.

The previous prime is 9969845929. The next prime is 9969845987. The reversal of 9969845972 is 2795489699.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142097 + ... + 200327.

It is an arithmetic number, because the mean of its divisors is an integer number (758995888).

Almost surely, 2^9969845972 is an apocalyptic number.

9969845972 is a gapful number since it is divisible by the number (92) formed by its first and last digit.

It is an amenable number.

9969845972 is a deficient number, since it is larger than the sum of its proper divisors (8246055340).

9969845972 is a wasteful number, since it uses less digits than its factorization.

9969845972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60119 (or 60117 counting only the distinct ones).

The product of its digits is 88179840, while the sum is 68.

The square root of 9969845972 is about 99849.1160301382. The cubic root of 9969845972 is about 2152.2670136316.

The spelling of 9969845972 in words is "nine billion, nine hundred sixty-nine million, eight hundred forty-five thousand, nine hundred seventy-two".