643126750411 has 2 divisors, whose sum is σ = 643126750412. Its totient is φ = 643126750410.

The previous prime is 643126750397. The next prime is 643126750429. The reversal of 643126750411 is 114057621346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 643126750411 - 2⁵ = 643126750379 is a prime.

It is a super-2 number, since 2×643126750411² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (643126751411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321563375205 + 321563375206.

It is an arithmetic number, because the mean of its divisors is an integer number (321563375206).

Almost surely, 2^643126750411 is an apocalyptic number.

643126750411 is a deficient number, since it is larger than the sum of its proper divisors (1).

643126750411 is an equidigital number, since it uses as much as digits as its factorization.

643126750411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 643126750411 in words is "six hundred forty-three billion, one hundred twenty-six million, seven hundred fifty thousand, four hundred eleven".