32997557686 has 4 divisors (see below), whose sum is σ = 49496336532. Its totient is φ = 16498778842.

The previous prime is 32997557669. The next prime is 32997557707. The reversal of 32997557686 is 68675579923.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8249389420 + ... + 8249389423.

It is an arithmetic number, because the mean of its divisors is an integer number (12374084133).

Almost surely, 2^32997557686 is an apocalyptic number.

32997557686 is a deficient number, since it is larger than the sum of its proper divisors (16498778846).

32997557686 is a wasteful number, since it uses less digits than its factorization.

32997557686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16498778845.

The product of its digits is 171460800, while the sum is 67.

The spelling of 32997557686 in words is "thirty-two billion, nine hundred ninety-seven million, five hundred fifty-seven thousand, six hundred eighty-six".