9951551598 has 64 divisors (see below), whose sum is σ = 20676280320. Its totient is φ = 3190586112.

The previous prime is 9951551593. The next prime is 9951551609. The reversal of 9951551598 is 8951551599.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9951551593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11530915 + ... + 11531777.

It is an arithmetic number, because the mean of its divisors is an integer number (323066880).

Almost surely, 2^9951551598 is an apocalyptic number.

9951551598 is an abundant number, since it is smaller than the sum of its proper divisors (10724728722).

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

9951551598 is a wasteful number, since it uses less digits than its factorization.

9951551598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441.

The product of its digits is 3645000, while the sum is 57.

The square root of 9951551598 is about 99757.4638711310. The cubic root of 9951551598 is about 2150.9497587146.

Subtracting from 9951551598 its reverse (8951551599), we obtain a palindrome (999999999).

The spelling of 9951551598 in words is "nine billion, nine hundred fifty-one million, five hundred fifty-one thousand, five hundred ninety-eight".