11428362581 has 2 divisors, whose sum is σ = 11428362582. Its totient is φ = 11428362580.

The previous prime is 11428362553. The next prime is 11428362593. The reversal of 11428362581 is 18526382411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8246274481 + 3182088100 = 90809^2 + 56410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11428362581 is a prime.

It is a super-2 number, since 2×11428362581² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11428364581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5714181290 + 5714181291.

It is an arithmetic number, because the mean of its divisors is an integer number (5714181291).

Almost surely, 2^11428362581 is an apocalyptic number.

It is an amenable number.

11428362581 is a deficient number, since it is larger than the sum of its proper divisors (1).

11428362581 is an equidigital number, since it uses as much as digits as its factorization.

11428362581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 41.

The spelling of 11428362581 in words is "eleven billion, four hundred twenty-eight million, three hundred sixty-two thousand, five hundred eighty-one".