9951558806 has 32 divisors (see below), whose sum is σ = 17622312960. Its totient is φ = 4124520000.

The previous prime is 9951558797. The next prime is 9951558811. The reversal of 9951558806 is 6088551599.

It is a super-2 number, since 2×9951558806² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 691181 + ... + 705431.

It is an arithmetic number, because the mean of its divisors is an integer number (550697280).

Almost surely, 2^9951558806 is an apocalyptic number.

It is a pronic number, being equal to 99757×99758.

9951558806 is a deficient number, since it is larger than the sum of its proper divisors (7670754154).

9951558806 is a wasteful number, since it uses less digits than its factorization.

9951558806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15900.

The product of its (nonzero) digits is 3888000, while the sum is 56.

The square root of 9951558806 is about 99757.4999987470. The cubic root of 9951558806 is about 2150.9502780320.

The spelling of 9951558806 in words is "nine billion, nine hundred fifty-one million, five hundred fifty-eight thousand, eight hundred six".