691343420102 has 16 divisors (see below), whose sum is σ = 1099268081280. Its totient is φ = 324967099008.

The previous prime is 691343420083. The next prime is 691343420123. The reversal of 691343420102 is 201024343196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11562902 + ... + 11622537.

It is an arithmetic number, because the mean of its divisors is an integer number (68704255080).

Almost surely, 2^691343420102 is an apocalyptic number.

691343420102 is a deficient number, since it is larger than the sum of its proper divisors (407924661178).

691343420102 is a wasteful number, since it uses less digits than its factorization.

691343420102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23186335.

The product of its (nonzero) digits is 31104, while the sum is 35.

Adding to 691343420102 its reverse (201024343196), we get a palindrome (892367763298).

The spelling of 691343420102 in words is "six hundred ninety-one billion, three hundred forty-three million, four hundred twenty thousand, one hundred two".