536444135621 has 2 divisors, whose sum is σ = 536444135622.
Its totient is φ = 536444135620.
The previous prime is 536444135599. The next prime is 536444135629. The reversal of 536444135621 is 126531444635.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 313387236100 + 223056899521 = 559810^2 + 472289^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-536444135621 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (536444135629) 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, 268222067810 + 268222067811.
It is an arithmetic number, because the mean of its divisors is an integer number (268222067811).
Almost surely, 2536444135621 is an apocalyptic number.
It is an amenable number.
536444135621 is a deficient number, since it is larger than the sum of its proper divisors (1).
536444135621 is an equidigital number, since it uses as much as digits as its factorization.
536444135621 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 1036800, while the sum is 44.
The spelling of 536444135621 in words is "five hundred thirty-six billion, four hundred forty-four million, one hundred thirty-five thousand, six hundred twenty-one".