9968857251 has 8 divisors (see below), whose sum is σ = 13296496320. Its totient is φ = 6643561512.

The previous prime is 9968857231. The next prime is 9968857267. The reversal of 9968857251 is 1527588699.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9968857251 - 2⁹ = 9968856739 is a prime.

It is a super-2 number, since 2×9968857251² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9968857231) 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 7 ways as a sum of consecutive naturals, for example, 575881 + ... + 592938.

It is an arithmetic number, because the mean of its divisors is an integer number (1662062040).

Almost surely, 2^9968857251 is an apocalyptic number.

9968857251 is a deficient number, since it is larger than the sum of its proper divisors (3327639069).

9968857251 is a wasteful number, since it uses less digits than its factorization.

9968857251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171665.

The product of its digits is 10886400, while the sum is 60.

The square root of 9968857251 is about 99844.1648320021. The cubic root of 9968857251 is about 2152.1958636878.

The spelling of 9968857251 in words is "nine billion, nine hundred sixty-eight million, eight hundred fifty-seven thousand, two hundred fifty-one".