231966689690 has 16 divisors (see below), whose sum is σ = 418047395328. Its totient is φ = 92673930576.

The previous prime is 231966689687. The next prime is 231966689707. The reversal of 231966689690 is 96986669132.

It is a super-2 number, since 2×231966689690² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14084522 + ... + 14100981.

It is an arithmetic number, because the mean of its divisors is an integer number (26127962208).

Almost surely, 2^231966689690 is an apocalyptic number.

231966689690 is a deficient number, since it is larger than the sum of its proper divisors (186080705638).

231966689690 is a wasteful number, since it uses less digits than its factorization.

231966689690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28186333.

The product of its (nonzero) digits is 45349632, while the sum is 65.

The spelling of 231966689690 in words is "two hundred thirty-one billion, nine hundred sixty-six million, six hundred eighty-nine thousand, six hundred ninety".