61231590189 has 48 divisors (see below), whose sum is σ = 111111796224. Its totient is φ = 31565757600.

The previous prime is 61231590157. The next prime is 61231590209. The reversal of 61231590189 is 98109513216.

61231590189 is a `hidden beast` number, since 6 + 12 + 31 + 590 + 18 + 9 = 666.

It is not a de Polignac number, because 61231590189 - 2⁵ = 61231590157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61231590139) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 246459 + ... + 428024.

It is an arithmetic number, because the mean of its divisors is an integer number (2314829088).

Almost surely, 2^61231590189 is an apocalyptic number.

It is an amenable number.

61231590189 is a deficient number, since it is larger than the sum of its proper divisors (49880206035).

61231590189 is a wasteful number, since it uses less digits than its factorization.

61231590189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674638 (or 674635 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 61231590189 in words is "sixty-one billion, two hundred thirty-one million, five hundred ninety thousand, one hundred eighty-nine".