7161638328 has 80 divisors (see below), whose sum is σ = 21602260680. Its totient is φ = 2203578432.

The previous prime is 7161638311. The next prime is 7161638333. The reversal of 7161638328 is 8238361617.

7161638328 is a `hidden beast` number, since 7 + 1 + 6 + 1 + 638 + 3 + 2 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 416650 + ... + 433497.

Almost surely, 2^7161638328 is an apocalyptic number.

7161638328 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

7161638328 is an abundant number, since it is smaller than the sum of its proper divisors (14440622352).

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

7161638328 is a wasteful number, since it uses less digits than its factorization.

7161638328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850178 (or 850165 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 7161638328 is about 84626.4635205797. The cubic root of 7161638328 is about 1927.5432357181.

The spelling of 7161638328 in words is "seven billion, one hundred sixty-one million, six hundred thirty-eight thousand, three hundred twenty-eight".