8551381328 has 40 divisors (see below), whose sum is σ = 18940787712. Its totient is φ = 3663796608.

The previous prime is 8551381309. The next prime is 8551381337. The reversal of 8551381328 is 8231831558.

It is a super-2 number, since 2×8551381328² (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 7 ways as a sum of consecutive naturals, for example, 456401 + ... + 474767.

Almost surely, 2^8551381328 is an apocalyptic number.

It is an amenable number.

8551381328 is an abundant number, since it is smaller than the sum of its proper divisors (10389406384).

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

8551381328 is a wasteful number, since it uses less digits than its factorization.

8551381328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22539 (or 22533 counting only the distinct ones).

The product of its digits is 230400, while the sum is 44.

The square root of 8551381328 is about 92473.6791092471. The cubic root of 8551381328 is about 2044.9314665491.

The spelling of 8551381328 in words is "eight billion, five hundred fifty-one million, three hundred eighty-one thousand, three hundred twenty-eight".