131487557135406 has 48 divisors (see below), whose sum is σ = 263755307824848. Its totient is φ = 43699536352000.

The previous prime is 131487557135387. The next prime is 131487557135471. The reversal of 131487557135406 is 604531755784131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 131487557135406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6109721926 + ... + 6109743446.

It is an arithmetic number, because the mean of its divisors is an integer number (5494902246351).

Almost surely, 2^{131487557135406} is an apocalyptic number.

131487557135406 is an abundant number, since it is smaller than the sum of its proper divisors (132267750689442).

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

131487557135406 is an equidigital number, since it uses as much as digits as its factorization.

131487557135406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30145 (or 29786 counting only the distinct ones).

The product of its (nonzero) digits is 42336000, while the sum is 60.

The spelling of 131487557135406 in words is "one hundred thirty-one trillion, four hundred eighty-seven billion, five hundred fifty-seven million, one hundred thirty-five thousand, four hundred six".