691480238132 has 12 divisors (see below), whose sum is σ = 1210461974820. Its totient is φ = 345633959616.

The previous prime is 691480238129. The next prime is 691480238167. The reversal of 691480238132 is 231832084196.

It can be written as a sum of positive squares in 2 ways, for example, as 597179655076 + 94300583056 = 772774^2 + 307084^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26525207 + ... + 26551262.

It is an arithmetic number, because the mean of its divisors is an integer number (100871831235).

Almost surely, 2^691480238132 is an apocalyptic number.

It is an amenable number.

691480238132 is a deficient number, since it is larger than the sum of its proper divisors (518981736688).

691480238132 is a wasteful number, since it uses less digits than its factorization.

691480238132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53079730 (or 53079728 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 691480238132 in words is "six hundred ninety-one billion, four hundred eighty million, two hundred thirty-eight thousand, one hundred thirty-two".