131138948556 has 576 divisors, whose sum is σ = 445577932800. Its totient is φ = 31499020800.

The previous prime is 131138948477. The next prime is 131138948579. The reversal of 131138948556 is 655849831131.

131138948556 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 3 + 89 + 4 + 8 + 556 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 572659050 + ... + 572659278.

It is an arithmetic number, because the mean of its divisors is an integer number (773572800).

Almost surely, 2^131138948556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131138948556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222788966400).

131138948556 is an abundant number, since it is smaller than the sum of its proper divisors (314438984244).

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

131138948556 is a wasteful number, since it uses less digits than its factorization.

131138948556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 485 counting only the distinct ones).

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

The spelling of 131138948556 in words is "one hundred thirty-one billion, one hundred thirty-eight million, nine hundred forty-eight thousand, five hundred fifty-six".