8161372788 has 48 divisors (see below), whose sum is σ = 19142899776. Its totient is φ = 2706255360.

The previous prime is 8161372753. The next prime is 8161372789. The reversal of 8161372788 is 8872731618.

It is a self number, because there is not a number n which added to its sum of digits gives 8161372788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161372789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1936003 + ... + 1940213.

It is an arithmetic number, because the mean of its divisors is an integer number (398810412).

Almost surely, 2^8161372788 is an apocalyptic number.

It is an amenable number.

8161372788 is an abundant number, since it is smaller than the sum of its proper divisors (10981526988).

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

8161372788 is a wasteful number, since it uses less digits than its factorization.

8161372788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5024 (or 5022 counting only the distinct ones).

The product of its digits is 903168, while the sum is 51.

The square root of 8161372788 is about 90340.3165148318. The cubic root of 8161372788 is about 2013.3583114479.

The spelling of 8161372788 in words is "eight billion, one hundred sixty-one million, three hundred seventy-two thousand, seven hundred eighty-eight".