691553452223 has 16 divisors (see below), whose sum is σ = 760989976320. Its totient is φ = 625524996096.

The previous prime is 691553452199. The next prime is 691553452231. The reversal of 691553452223 is 322254355196.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 691553452223 - 2¹⁸ = 691553190079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (691553452253) 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, 1207490 + ... + 1685567.

It is an arithmetic number, because the mean of its divisors is an integer number (47561873520).

Almost surely, 2^691553452223 is an apocalyptic number.

691553452223 is a deficient number, since it is larger than the sum of its proper divisors (69436524097).

691553452223 is a wasteful number, since it uses less digits than its factorization.

691553452223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2893646.

The product of its digits is 1944000, while the sum is 47.

The spelling of 691553452223 in words is "six hundred ninety-one billion, five hundred fifty-three million, four hundred fifty-two thousand, two hundred twenty-three".