6131819252161 has 4 divisors (see below), whose sum is σ = 6297544096852. Its totient is φ = 5966094407472.

The previous prime is 6131819252149. The next prime is 6131819252189. The reversal of 6131819252161 is 1612529181316.

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 3487556250000 + 2644263002161 = 1867500^2 + 1626119^2 .

It is a cyclic number.

It is not a de Polignac number, because 6131819252161 - 2⁷ = 6131819252033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6131819252561) 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, 82862422290 + ... + 82862422363.

It is an arithmetic number, because the mean of its divisors is an integer number (1574386024213).

Almost surely, 2^{6131819252161} is an apocalyptic number.

It is an amenable number.

6131819252161 is a deficient number, since it is larger than the sum of its proper divisors (165724844691).

6131819252161 is a wasteful number, since it uses less digits than its factorization.

6131819252161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165724844690.

The product of its digits is 155520, while the sum is 46.

The spelling of 6131819252161 in words is "six trillion, one hundred thirty-one billion, eight hundred nineteen million, two hundred fifty-two thousand, one hundred sixty-one".