643115165463 has 24 divisors (see below), whose sum is σ = 963646931520. Its totient is φ = 412991504640.

The previous prime is 643115165401. The next prime is 643115165479. The reversal of 643115165463 is 364561511346.

643115165463 is a `hidden beast` number, since 6 + 4 + 31 + 151 + 6 + 5 + 463 = 666.

It is not a de Polignac number, because 643115165463 - 2¹⁶ = 643115099927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643115164463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11001606 + ... + 11059907.

It is an arithmetic number, because the mean of its divisors is an integer number (40151955480).

Almost surely, 2^643115165463 is an apocalyptic number.

643115165463 is a deficient number, since it is larger than the sum of its proper divisors (320531766057).

643115165463 is a wasteful number, since it uses less digits than its factorization.

643115165463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22061639 (or 22061636 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The spelling of 643115165463 in words is "six hundred forty-three billion, one hundred fifteen million, one hundred sixty-five thousand, four hundred sixty-three".