231601990946 has 16 divisors (see below), whose sum is σ = 359608481280. Its totient is φ = 111753308640.

The previous prime is 231601990943. The next prime is 231601990951. The reversal of 231601990946 is 649099106132.

It is a junction number, because it is equal to n+sod(n) for n = 231601990894 and 231601990903.

It is not an unprimeable number, because it can be changed into a prime (231601990943) 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, 5180411 + ... + 5224926.

It is an arithmetic number, because the mean of its divisors is an integer number (22475530080).

Almost surely, 2^231601990946 is an apocalyptic number.

231601990946 is a deficient number, since it is larger than the sum of its proper divisors (128006490334).

231601990946 is a wasteful number, since it uses less digits than its factorization.

231601990946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10405729.

The product of its (nonzero) digits is 629856, while the sum is 50.

The spelling of 231601990946 in words is "two hundred thirty-one billion, six hundred one million, nine hundred ninety thousand, nine hundred forty-six".