84345556513 has 2 divisors, whose sum is σ = 84345556514. Its totient is φ = 84345556512.

The previous prime is 84345556487. The next prime is 84345556579. The reversal of 84345556513 is 31565554348.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72128233489 + 12217323024 = 268567^2 + 110532^2 .

It is a cyclic number.

It is not a de Polignac number, because 84345556513 - 2⁵ = 84345556481 is a prime.

It is a super-2 number, since 2×84345556513² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (84345556583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42172778256 + 42172778257.

It is an arithmetic number, because the mean of its divisors is an integer number (42172778257).

Almost surely, 2^84345556513 is an apocalyptic number.

It is an amenable number.

84345556513 is a deficient number, since it is larger than the sum of its proper divisors (1).

84345556513 is an equidigital number, since it uses as much as digits as its factorization.

84345556513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320000, while the sum is 49.

The spelling of 84345556513 in words is "eighty-four billion, three hundred forty-five million, five hundred fifty-six thousand, five hundred thirteen".