691225734163 has 16 divisors (see below), whose sum is σ = 714926512800. Its totient is φ = 667792339200.

The previous prime is 691225734161. The next prime is 691225734169. The reversal of 691225734163 is 361437522196.

It is not a de Polignac number, because 691225734163 - 2¹ = 691225734161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (691225734161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16578823 + ... + 16620463.

It is an arithmetic number, because the mean of its divisors is an integer number (44682907050).

Almost surely, 2^691225734163 is an apocalyptic number.

691225734163 is a deficient number, since it is larger than the sum of its proper divisors (23700778637).

691225734163 is a wasteful number, since it uses less digits than its factorization.

691225734163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44838.

The product of its digits is 1632960, while the sum is 49.

The spelling of 691225734163 in words is "six hundred ninety-one billion, two hundred twenty-five million, seven hundred thirty-four thousand, one hundred sixty-three".