691982419226 has 16 divisors (see below), whose sum is σ = 1186345483200. Its totient is φ = 296541417120.

The previous prime is 691982419217. The next prime is 691982419231. The reversal of 691982419226 is 622914289196.

It is a happy number.

It is a super-2 number, since 2×691982419226² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1681076 + ... + 2051823.

It is an arithmetic number, because the mean of its divisors is an integer number (74146592700).

Almost surely, 2^691982419226 is an apocalyptic number.

691982419226 is a deficient number, since it is larger than the sum of its proper divisors (494363063974).

691982419226 is a wasteful number, since it uses less digits than its factorization.

691982419226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3746149.

The product of its digits is 6718464, while the sum is 59.

The spelling of 691982419226 in words is "six hundred ninety-one billion, nine hundred eighty-two million, four hundred nineteen thousand, two hundred twenty-six".