643164848053 has 32 divisors (see below), whose sum is σ = 817279016960. Its totient is φ = 492367999680.

The previous prime is 643164848009. The next prime is 643164848071. The reversal of 643164848053 is 350848461346.

It is a cyclic number.

It is not a de Polignac number, because 643164848053 - 2¹³ = 643164839861 is a prime.

It is a super-2 number, since 2×643164848053² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643164848153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17096218 + ... + 17133796.

It is an arithmetic number, because the mean of its divisors is an integer number (25539969280).

Almost surely, 2^643164848053 is an apocalyptic number.

It is an amenable number.

643164848053 is a deficient number, since it is larger than the sum of its proper divisors (174114168907).

643164848053 is a wasteful number, since it uses less digits than its factorization.

643164848053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43697.

The product of its (nonzero) digits is 6635520, while the sum is 52.

The spelling of 643164848053 in words is "six hundred forty-three billion, one hundred sixty-four million, eight hundred forty-eight thousand, fifty-three".