84435644298769 has 3 divisors (see below), whose sum is σ = 84435653487657. Its totient is φ = 84435635109882.

The previous prime is 84435644298727. The next prime is 84435644298793. The reversal of 84435644298769 is 96789244653448.

The square root of 84435644298769 is 9188887.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 84435644298769 - 2²³ = 84435635910161 is a prime.

It is a super-2 number, since 2×84435644298769² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84435644296769) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4594444 + ... + 13783330.

It is an arithmetic number, because the mean of its divisors is an integer number (28145217829219).

Almost surely, 2^{84435644298769} is an apocalyptic number.

84435644298769 is the 9188887-th square number.

84435644298769 is the 4594444-th centered octagonal number.

It is an amenable number.

84435644298769 is a deficient number, since it is larger than the sum of its proper divisors (9188888).

84435644298769 is an frugal number, since it uses more digits than its factorization.

84435644298769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18377774 (or 9188887 counting only the distinct ones).

The product of its digits is 10032906240, while the sum is 79.

The spelling of 84435644298769 in words is "eighty-four trillion, four hundred thirty-five billion, six hundred forty-four million, two hundred ninety-eight thousand, seven hundred sixty-nine".