2131377645841 has 2 divisors, whose sum is σ = 2131377645842. Its totient is φ = 2131377645840.

The previous prime is 2131377645791. The next prime is 2131377645847. The reversal of 2131377645841 is 1485467731312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1128064906816 + 1003312739025 = 1062104^2 + 1001655^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131377645841 - 2²³ = 2131369257233 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131377645847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065688822920 + 1065688822921.

It is an arithmetic number, because the mean of its divisors is an integer number (1065688822921).

Almost surely, 2^{2131377645841} is an apocalyptic number.

It is an amenable number.

2131377645841 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131377645841 is an equidigital number, since it uses as much as digits as its factorization.

2131377645841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 52.

The spelling of 2131377645841 in words is "two trillion, one hundred thirty-one billion, three hundred seventy-seven million, six hundred forty-five thousand, eight hundred forty-one".