231723909774 has 192 divisors, whose sum is σ = 612806777856. Its totient is φ = 61774820352.

The previous prime is 231723909749. The next prime is 231723909787. The reversal of 231723909774 is 477909327132.

231723909774 is a `hidden beast` number, since 2 + 31 + 72 + 390 + 97 + 74 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 231723909774.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 199246117 + ... + 199247279.

It is an arithmetic number, because the mean of its divisors is an integer number (3191701968).

Almost surely, 2^231723909774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231723909774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306403388928).

231723909774 is an abundant number, since it is smaller than the sum of its proper divisors (381082868082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231723909774 is a wasteful number, since it uses less digits than its factorization.

231723909774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 4000752, while the sum is 54.

The spelling of 231723909774 in words is "two hundred thirty-one billion, seven hundred twenty-three million, nine hundred nine thousand, seven hundred seventy-four".