643125454435 has 16 divisors (see below), whose sum is σ = 772321527360. Its totient is φ = 514119864960.

The previous prime is 643125454327. The next prime is 643125454459. The reversal of 643125454435 is 534454521346.

It is not a de Polignac number, because 643125454435 - 2¹⁵ = 643125421667 is a prime.

It is a super-2 number, since 2×643125454435² (a number of 24 digits) contains 22 as substring.

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, 49774906 + ... + 49787824.

It is an arithmetic number, because the mean of its divisors is an integer number (48270095460).

Almost surely, 2^643125454435 is an apocalyptic number.

643125454435 is a deficient number, since it is larger than the sum of its proper divisors (129196072925).

643125454435 is a wasteful number, since it uses less digits than its factorization.

643125454435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19518.

The product of its digits is 3456000, while the sum is 46.

The spelling of 643125454435 in words is "six hundred forty-three billion, one hundred twenty-five million, four hundred fifty-four thousand, four hundred thirty-five".