643134054745 has 64 divisors (see below), whose sum is σ = 1006262369280. Its totient is φ = 382935195648.

The previous prime is 643134054691. The next prime is 643134054749. The reversal of 643134054745 is 547450431346.

It is not a de Polignac number, because 643134054745 - 2⁷ = 643134054617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 643134054695 and 643134054704.

It is not an unprimeable number, because it can be changed into a prime (643134054749) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15394996 + ... + 15436714.

It is an arithmetic number, because the mean of its divisors is an integer number (15722849520).

Almost surely, 2^643134054745 is an apocalyptic number.

643134054745 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

643134054745 is a deficient number, since it is larger than the sum of its proper divisors (363128314535).

643134054745 is a wasteful number, since it uses less digits than its factorization.

643134054745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43754.

The product of its (nonzero) digits is 2419200, while the sum is 46.

The spelling of 643134054745 in words is "six hundred forty-three billion, one hundred thirty-four million, fifty-four thousand, seven hundred forty-five".