131318539641 has 27 divisors (see below), whose sum is σ = 190954889541. Its totient is φ = 86962262904.

The previous prime is 131318539631. The next prime is 131318539657. The reversal of 131318539641 is 146935813131.

The square root of 131318539641 is 362379.

It is a perfect power (a square), and thus also a powerful number.

131318539641 is a `hidden beast` number, since 13 + 131 + 85 + 396 + 41 = 666.

It is not a de Polignac number, because 131318539641 - 2¹⁵ = 131318506873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131318539631) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 216339960 + ... + 216340566.

Almost surely, 2^131318539641 is an apocalyptic number.

131318539641 is the 362379-th square number.

131318539641 is the 181190-th centered octagonal number.

It is an amenable number.

131318539641 is a deficient number, since it is larger than the sum of its proper divisors (59636349900).

131318539641 is an frugal number, since it uses more digits than its factorization.

131318539641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618 (or 809 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The spelling of 131318539641 in words is "one hundred thirty-one billion, three hundred eighteen million, five hundred thirty-nine thousand, six hundred forty-one".