231699533645 has 16 divisors (see below), whose sum is σ = 278294704128. Its totient is φ = 185189547840.

The previous prime is 231699533633. The next prime is 231699533731. The reversal of 231699533645 is 546335996132.

It is not a de Polignac number, because 231699533645 - 2²² = 231695339341 is a prime.

It is a super-3 number, since 3×231699533645³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33522740 + ... + 33529650.

It is an arithmetic number, because the mean of its divisors is an integer number (17393419008).

Almost surely, 2^231699533645 is an apocalyptic number.

It is an amenable number.

231699533645 is a deficient number, since it is larger than the sum of its proper divisors (46595170483).

231699533645 is a wasteful number, since it uses less digits than its factorization.

231699533645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12100.

The product of its digits is 15746400, while the sum is 56.

The spelling of 231699533645 in words is "two hundred thirty-one billion, six hundred ninety-nine million, five hundred thirty-three thousand, six hundred forty-five".