691319440614 has 32 divisors (see below), whose sum is σ = 1511738204544. Its totient is φ = 209017839680.

The previous prime is 691319440597. The next prime is 691319440631. The reversal of 691319440614 is 416044913196.

691319440614 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (691319440597) and next prime (691319440631).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11793039 + ... + 11851514.

It is an arithmetic number, because the mean of its divisors is an integer number (47241818892).

Almost surely, 2^691319440614 is an apocalyptic number.

691319440614 is an abundant number, since it is smaller than the sum of its proper divisors (820418763930).

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

691319440614 is a wasteful number, since it uses less digits than its factorization.

691319440614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23645012.

The product of its (nonzero) digits is 559872, while the sum is 48.

The spelling of 691319440614 in words is "six hundred ninety-one billion, three hundred nineteen million, four hundred forty thousand, six hundred fourteen".