691734017072 has 80 divisors (see below), whose sum is σ = 1587960364032. Its totient is φ = 285741949440.

The previous prime is 691734017057. The next prime is 691734017077. The reversal of 691734017072 is 270710437196.

It is not an unprimeable number, because it can be changed into a prime (691734017077) 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 15 ways as a sum of consecutive naturals, for example, 526328 + ... + 1288599.

Almost surely, 2^691734017072 is an apocalyptic number.

It is an amenable number.

691734017072 is an abundant number, since it is smaller than the sum of its proper divisors (896226346960).

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

691734017072 is a wasteful number, since it uses less digits than its factorization.

691734017072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815066 (or 1815060 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 47.

The spelling of 691734017072 in words is "six hundred ninety-one billion, seven hundred thirty-four million, seventeen thousand, seventy-two".