8434451645 has 16 divisors (see below), whose sum is σ = 10226995632. Its totient is φ = 6677314560.

The previous prime is 8434451593. The next prime is 8434451681. The reversal of 8434451645 is 5461544348.

It can be written as a sum of positive squares in 8 ways, for example, as 606095161 + 7828356484 = 24619^2 + 88478^2 .

It is not a de Polignac number, because 8434451645 - 2¹⁶ = 8434386109 is a prime.

It is a super-2 number, since 2×8434451645² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8434451596 and 8434451605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 357515 + ... + 380375.

It is an arithmetic number, because the mean of its divisors is an integer number (639187227).

Almost surely, 2^8434451645 is an apocalyptic number.

It is an amenable number.

8434451645 is a deficient number, since it is larger than the sum of its proper divisors (1792543987).

8434451645 is a wasteful number, since it uses less digits than its factorization.

8434451645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23632.

The product of its digits is 921600, while the sum is 44.

The square root of 8434451645 is about 91839.2707124790. The cubic root of 8434451645 is about 2035.5680122920.

The spelling of 8434451645 in words is "eight billion, four hundred thirty-four million, four hundred fifty-one thousand, six hundred forty-five".