131231580856 has 8 divisors (see below), whose sum is σ = 246059214120. Its totient is φ = 65615790424.

The previous prime is 131231580793. The next prime is 131231580863. The reversal of 131231580856 is 658085132131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8201973796 + ... + 8201973811.

It is an arithmetic number, because the mean of its divisors is an integer number (30757401765).

Almost surely, 2^131231580856 is an apocalyptic number.

It is an amenable number.

131231580856 is a deficient number, since it is larger than the sum of its proper divisors (114827633264).

131231580856 is a wasteful number, since it uses less digits than its factorization.

131231580856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16403947613 (or 16403947609 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 131231580856 in words is "one hundred thirty-one billion, two hundred thirty-one million, five hundred eighty thousand, eight hundred fifty-six".