9951172456 has 32 divisors (see below), whose sum is σ = 19494043200. Its totient is φ = 4753302400.

The previous prime is 9951172417. The next prime is 9951172457. The reversal of 9951172456 is 6542711599.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (9951172457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115431 + ... + 182281.

It is an arithmetic number, because the mean of its divisors is an integer number (609188850).

Almost surely, 2^9951172456 is an apocalyptic number.

It is an amenable number.

9951172456 is a deficient number, since it is larger than the sum of its proper divisors (9542870744).

9951172456 is a wasteful number, since it uses less digits than its factorization.

9951172456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67689 (or 67685 counting only the distinct ones).

The product of its digits is 680400, while the sum is 49.

The square root of 9951172456 is about 99755.5635340706. The cubic root of 9951172456 is about 2150.9224421787.

The spelling of 9951172456 in words is "nine billion, nine hundred fifty-one million, one hundred seventy-two thousand, four hundred fifty-six".