691163847427 has 8 divisors (see below), whose sum is σ = 692065539360. Its totient is φ = 690262302720.

The previous prime is 691163847329. The next prime is 691163847431. The reversal of 691163847427 is 724748361196.

It is a happy number.

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 691163847427 - 2⁷ = 691163847299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (691163841427) 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, 11812099 + ... + 11870467.

It is an arithmetic number, because the mean of its divisors is an integer number (86508192420).

Almost surely, 2^691163847427 is an apocalyptic number.

691163847427 is a deficient number, since it is larger than the sum of its proper divisors (901691933).

691163847427 is a wasteful number, since it uses less digits than its factorization.

691163847427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73613.

The product of its digits is 12192768, while the sum is 58.

The spelling of 691163847427 in words is "six hundred ninety-one billion, one hundred sixty-three million, eight hundred forty-seven thousand, four hundred twenty-seven".