12795331981 has 2 divisors, whose sum is σ = 12795331982. Its totient is φ = 12795331980.

The previous prime is 12795331961. The next prime is 12795332087. The reversal of 12795331981 is 18913359721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10923385225 + 1871946756 = 104515^2 + 43266^2 .

It is a cyclic number.

It is not a de Polignac number, because 12795331981 - 2¹³ = 12795323789 is a prime.

It is a super-2 number, since 2×12795331981² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12795331951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6397665990 + 6397665991.

It is an arithmetic number, because the mean of its divisors is an integer number (6397665991).

Almost surely, 2^12795331981 is an apocalyptic number.

It is an amenable number.

12795331981 is a deficient number, since it is larger than the sum of its proper divisors (1).

12795331981 is an equidigital number, since it uses as much as digits as its factorization.

12795331981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 49.

The spelling of 12795331981 in words is "twelve billion, seven hundred ninety-five million, three hundred thirty-one thousand, nine hundred eighty-one".