31643428996 has 27 divisors (see below), whose sum is σ = 57370069029. Its totient is φ = 15271157328.

The previous prime is 31643428961. The next prime is 31643429011. The reversal of 31643428996 is 69982434613.

The square root of 31643428996 is 177886.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 16593046596 + 15050382400 = 128814^2 + 122680^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10315855 + ... + 10318921.

Almost surely, 2^31643428996 is an apocalyptic number.

31643428996 is the 177886-th square number.

It is an amenable number.

31643428996 is a deficient number, since it is larger than the sum of its proper divisors (25726640033).

31643428996 is an frugal number, since it uses more digits than its factorization.

31643428996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6196 (or 3098 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 55.

The spelling of 31643428996 in words is "thirty-one billion, six hundred forty-three million, four hundred twenty-eight thousand, nine hundred ninety-six".