643106020115 has 16 divisors (see below), whose sum is σ = 831191769408. Its totient is φ = 474851396736.

The previous prime is 643106020087. The next prime is 643106020121. The reversal of 643106020115 is 511020601346.

It is a happy number.

643106020115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 643106020115 - 2¹⁰ = 643106019091 is a prime.

It is a super-2 number, since 2×643106020115² (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, 57479 + ... + 1135568.

It is an arithmetic number, because the mean of its divisors is an integer number (51949485588).

Almost surely, 2^643106020115 is an apocalyptic number.

643106020115 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

643106020115 is a deficient number, since it is larger than the sum of its proper divisors (188085749293).

643106020115 is a wasteful number, since it uses less digits than its factorization.

643106020115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201358.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 643106020115 in words is "six hundred forty-three billion, one hundred six million, twenty thousand, one hundred fifteen".