9951632649 has 16 divisors (see below), whose sum is σ = 16849325440. Its totient is φ = 5686647120.

The previous prime is 9951632623. The next prime is 9951632651. The reversal of 9951632649 is 9462361599.

9951632649 is a `hidden beast` number, since 99 + 516 + 32 + 6 + 4 + 9 = 666.

It is not a de Polignac number, because 9951632649 - 2⁹ = 9951632137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9951632595 and 9951632604.

It is not an unprimeable number, because it can be changed into a prime (9951632549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26326882 + ... + 26327259.

It is an arithmetic number, because the mean of its divisors is an integer number (1053082840).

Almost surely, 2^9951632649 is an apocalyptic number.

It is an amenable number.

9951632649 is a deficient number, since it is larger than the sum of its proper divisors (6897692791).

9951632649 is a wasteful number, since it uses less digits than its factorization.

9951632649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52654157 (or 52654151 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The square root of 9951632649 is about 99757.8701105833. The cubic root of 9951632649 is about 2150.9555982112.

The spelling of 9951632649 in words is "nine billion, nine hundred fifty-one million, six hundred thirty-two thousand, six hundred forty-nine".