231601990945 has 32 divisors (see below), whose sum is σ = 305806233600. Its totient is φ = 167315174400.

The previous prime is 231601990943. The next prime is 231601990951. The reversal of 231601990945 is 549099106132.

It is not a de Polignac number, because 231601990945 - 2¹ = 231601990943 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 7313145 + ... + 7344745.

It is an arithmetic number, because the mean of its divisors is an integer number (9556444800).

Almost surely, 2^231601990945 is an apocalyptic number.

It is an amenable number.

231601990945 is a deficient number, since it is larger than the sum of its proper divisors (74204242655).

231601990945 is a wasteful number, since it uses less digits than its factorization.

231601990945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34065.

The product of its (nonzero) digits is 524880, while the sum is 49.

The spelling of 231601990945 in words is "two hundred thirty-one billion, six hundred one million, nine hundred ninety thousand, nine hundred forty-five".