231865159680 has 1872 divisors, whose sum is σ = 1096287633792. Its totient is φ = 43882905600.

The previous prime is 231865159661. The next prime is 231865159693. The reversal of 231865159680 is 86951568132.

231865159680 is a `hidden beast` number, since 2 + 31 + 8 + 6 + 515 + 96 + 8 + 0 = 666.

It is a super-2 number, since 2×231865159680² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7479521265 + ... + 7479521295.

It is an arithmetic number, because the mean of its divisors is an integer number (585623736).

Almost surely, 2^231865159680 is an apocalyptic number.

231865159680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231865159680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (548143816896).

231865159680 is an abundant number, since it is smaller than the sum of its proper divisors (864422474112).

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

231865159680 is a wasteful number, since it uses less digits than its factorization.

231865159680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 231865159680 in words is "two hundred thirty-one billion, eight hundred sixty-five million, one hundred fifty-nine thousand, six hundred eighty".