643777053 has 8 divisors (see below), whose sum is σ = 858487488. Its totient is φ = 429125664.

The previous prime is 643777051. The next prime is 643777067. The reversal of 643777053 is 350777346.

643777053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 643777053 - 2¹ = 643777051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 643776996 and 643777014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643777051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30576 + ... + 47142.

It is an arithmetic number, because the mean of its divisors is an integer number (107310936).

Almost surely, 2^643777053 is an apocalyptic number.

It is an amenable number.

643777053 is a deficient number, since it is larger than the sum of its proper divisors (214710435).

643777053 is a wasteful number, since it uses less digits than its factorization.

643777053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29523.

The product of its (nonzero) digits is 370440, while the sum is 42.

The square root of 643777053 is about 25372.7620293889. The cubic root of 643777053 is about 863.4658464805.

The spelling of 643777053 in words is "six hundred forty-three million, seven hundred seventy-seven thousand, fifty-three".