9712251128 has 64 divisors (see below), whose sum is σ = 19576404000. Its totient is φ = 4503693312.

The previous prime is 9712251097. The next prime is 9712251139. The reversal of 9712251128 is 8211522179.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 9712251091 and 9712251100.

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, 1516958 + ... + 1523346.

Almost surely, 2^9712251128 is an apocalyptic number.

It is an amenable number.

9712251128 is an abundant number, since it is smaller than the sum of its proper divisors (9864152872).

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

9712251128 is a wasteful number, since it uses less digits than its factorization.

9712251128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6624 (or 6620 counting only the distinct ones).

The product of its digits is 20160, while the sum is 38.

The square root of 9712251128 is about 98550.7540711891. The cubic root of 9712251128 is about 2133.5687144146.

The spelling of 9712251128 in words is "nine billion, seven hundred twelve million, two hundred fifty-one thousand, one hundred twenty-eight".