805538088613 has 2 divisors, whose sum is σ = 805538088614. Its totient is φ = 805538088612.

The previous prime is 805538088587. The next prime is 805538088617. The reversal of 805538088613 is 316880835508.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 771054341409 + 34483747204 = 878097^2 + 185698^2 .

It is a cyclic number.

It is not a de Polignac number, because 805538088613 - 2¹⁷ = 805537957541 is a prime.

It is a super-2 number, since 2×805538088613² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (805538088617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402769044306 + 402769044307.

It is an arithmetic number, because the mean of its divisors is an integer number (402769044307).

Almost surely, 2^805538088613 is an apocalyptic number.

It is an amenable number.

805538088613 is a deficient number, since it is larger than the sum of its proper divisors (1).

805538088613 is an equidigital number, since it uses as much as digits as its factorization.

805538088613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5529600, while the sum is 55.

The spelling of 805538088613 in words is "eight hundred five billion, five hundred thirty-eight million, eighty-eight thousand, six hundred thirteen".