84145720453 has 2 divisors, whose sum is σ = 84145720454. Its totient is φ = 84145720452.

The previous prime is 84145720433. The next prime is 84145720487. The reversal of 84145720453 is 35402754148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84054766084 + 90954369 = 289922^2 + 9537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84145720453 is a prime.

It is a super-3 number, since 3×84145720453³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84145720433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42072860226 + 42072860227.

It is an arithmetic number, because the mean of its divisors is an integer number (42072860227).

Almost surely, 2^84145720453 is an apocalyptic number.

It is an amenable number.

84145720453 is a deficient number, since it is larger than the sum of its proper divisors (1).

84145720453 is an equidigital number, since it uses as much as digits as its factorization.

84145720453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 537600, while the sum is 43.

The spelling of 84145720453 in words is "eighty-four billion, one hundred forty-five million, seven hundred twenty thousand, four hundred fifty-three".