691774454240 has 48 divisors (see below), whose sum is σ = 1639000137600. Its totient is φ = 275916894720.

The previous prime is 691774454213. The next prime is 691774454243. The reversal of 691774454240 is 42454477196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691774454243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6138416 + ... + 6250095.

It is an arithmetic number, because the mean of its divisors is an integer number (34145836200).

Almost surely, 2^691774454240 is an apocalyptic number.

It is an amenable number.

691774454240 is an abundant number, since it is smaller than the sum of its proper divisors (947225683360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691774454240 is a wasteful number, since it uses less digits than its factorization.

691774454240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12388875 (or 12388867 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 53.

The spelling of 691774454240 in words is "six hundred ninety-one billion, seven hundred seventy-four million, four hundred fifty-four thousand, two hundred forty".