691612023617 has 8 divisors (see below), whose sum is σ = 694883455392. Its totient is φ = 688347712800.

The previous prime is 691612023611. The next prime is 691612023631. The reversal of 691612023617 is 716320216196.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 691612023617 - 2²⁸ = 691343588161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (691612023611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1585484 + ... + 1974077.

It is an arithmetic number, because the mean of its divisors is an integer number (86860431924).

Almost surely, 2^691612023617 is an apocalyptic number.

It is an amenable number.

691612023617 is a deficient number, since it is larger than the sum of its proper divisors (3271431775).

691612023617 is a wasteful number, since it uses less digits than its factorization.

691612023617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3560479.

The product of its (nonzero) digits is 163296, while the sum is 44.

The spelling of 691612023617 in words is "six hundred ninety-one billion, six hundred twelve million, twenty-three thousand, six hundred seventeen".