131853152608861 has 4 divisors (see below), whose sum is σ = 131856333437052. Its totient is φ = 131849971780672.

The previous prime is 131853152608843. The next prime is 131853152608897. The reversal of 131853152608861 is 168806251358131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57377443544100 + 74475709064761 = 7574790^2 + 8629931^2 .

It is a cyclic number.

It is not a de Polignac number, because 131853152608861 - 2³⁵ = 131818792870493 is a prime.

It is a super-3 number, since 3×131853152608861³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131853152608796 and 131853152608805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131853152608061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1590351916 + ... + 1590434821.

It is an arithmetic number, because the mean of its divisors is an integer number (32964083359263).

Almost surely, 2^{131853152608861} is an apocalyptic number.

It is an amenable number.

131853152608861 is a deficient number, since it is larger than the sum of its proper divisors (3180828191).

131853152608861 is an equidigital number, since it uses as much as digits as its factorization.

131853152608861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180828190.

The product of its (nonzero) digits is 8294400, while the sum is 58.

The spelling of 131853152608861 in words is "one hundred thirty-one trillion, eight hundred fifty-three billion, one hundred fifty-two million, six hundred eight thousand, eight hundred sixty-one".