12400454581 has 2 divisors, whose sum is σ = 12400454582. Its totient is φ = 12400454580.

The previous prime is 12400454497. The next prime is 12400454587. The reversal of 12400454581 is 18545400421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8729912356 + 3670542225 = 93434^2 + 60585^2 .

It is a cyclic number.

It is not a de Polignac number, because 12400454581 - 2⁹ = 12400454069 is a prime.

It is a super-2 number, since 2×12400454581² (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 (12400454587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200227290 + 6200227291.

It is an arithmetic number, because the mean of its divisors is an integer number (6200227291).

Almost surely, 2^12400454581 is an apocalyptic number.

It is an amenable number.

12400454581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400454581 is an equidigital number, since it uses as much as digits as its factorization.

12400454581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25600, while the sum is 34.

The spelling of 12400454581 in words is "twelve billion, four hundred million, four hundred fifty-four thousand, five hundred eighty-one".