8971091128 has 16 divisors (see below), whose sum is σ = 17105895000. Its totient is φ = 4409519136.

The previous prime is 8971091099. The next prime is 8971091183. The reversal of 8971091128 is 8211901798.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9502803 + ... + 9503746.

Almost surely, 2^8971091128 is an apocalyptic number.

It is an amenable number.

8971091128 is a deficient number, since it is larger than the sum of its proper divisors (8134803872).

8971091128 is a wasteful number, since it uses less digits than its factorization.

8971091128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19006614 (or 19006610 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 46.

The square root of 8971091128 is about 94715.8441233567. The cubic root of 8971091128 is about 2077.8542905949.

It can be divided in two parts, 897 and 1091128, that added together give a square (1092025 = 1045²).

The spelling of 8971091128 in words is "eight billion, nine hundred seventy-one million, ninety-one thousand, one hundred twenty-eight".