12345771481 has 2 divisors, whose sum is σ = 12345771482. Its totient is φ = 12345771480.

The previous prime is 12345771469. The next prime is 12345771541. The reversal of 12345771481 is 18417754321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12325440400 + 20331081 = 111020^2 + 4509^2 .

It is a cyclic number.

It is not a de Polignac number, because 12345771481 - 2¹³ = 12345763289 is a prime.

It is a super-2 number, since 2×12345771481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12345771401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172885740 + 6172885741.

It is an arithmetic number, because the mean of its divisors is an integer number (6172885741).

Almost surely, 2^12345771481 is an apocalyptic number.

It is an amenable number.

12345771481 is a deficient number, since it is larger than the sum of its proper divisors (1).

12345771481 is an equidigital number, since it uses as much as digits as its factorization.

12345771481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 188160, while the sum is 43.

The spelling of 12345771481 in words is "twelve billion, three hundred forty-five million, seven hundred seventy-one thousand, four hundred eighty-one".