28961552605439 has 2 divisors, whose sum is σ = 28961552605440. Its totient is φ = 28961552605438.

The previous prime is 28961552605411. The next prime is 28961552605459. The reversal of 28961552605439 is 93450625516982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28961552605439 is a prime.

It is a super-2 number, since 2×28961552605439² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28961552605459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14480776302719 + 14480776302720.

It is an arithmetic number, because the mean of its divisors is an integer number (14480776302720).

Almost surely, 2^{28961552605439} is an apocalyptic number.

28961552605439 is a deficient number, since it is larger than the sum of its proper divisors (1).

28961552605439 is an equidigital number, since it uses as much as digits as its factorization.

28961552605439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968000, while the sum is 65.

The spelling of 28961552605439 in words is "twenty-eight trillion, nine hundred sixty-one billion, five hundred fifty-two million, six hundred five thousand, four hundred thirty-nine".