643017160831 has 2 divisors, whose sum is σ = 643017160832. Its totient is φ = 643017160830.

The previous prime is 643017160693. The next prime is 643017160853. The reversal of 643017160831 is 138061710346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 643017160831 - 2¹³ = 643017152639 is a prime.

It is a super-2 number, since 2×643017160831² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (643017160861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321508580415 + 321508580416.

It is an arithmetic number, because the mean of its divisors is an integer number (321508580416).

Almost surely, 2^643017160831 is an apocalyptic number.

643017160831 is a deficient number, since it is larger than the sum of its proper divisors (1).

643017160831 is an equidigital number, since it uses as much as digits as its factorization.

643017160831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 643017160831 in words is "six hundred forty-three billion, seventeen million, one hundred sixty thousand, eight hundred thirty-one".