5642043871 has 2 divisors, whose sum is σ = 5642043872. Its totient is φ = 5642043870.

The previous prime is 5642043811. The next prime is 5642043877. The reversal of 5642043871 is 1783402465.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5642043871 - 2²³ = 5633655263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5642043877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2821021935 + 2821021936.

It is an arithmetic number, because the mean of its divisors is an integer number (2821021936).

Almost surely, 2^5642043871 is an apocalyptic number.

5642043871 is a deficient number, since it is larger than the sum of its proper divisors (1).

5642043871 is an equidigital number, since it uses as much as digits as its factorization.

5642043871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 5642043871 is about 75113.5398646609. The cubic root of 5642043871 is about 1780.2410849445.

The spelling of 5642043871 in words is "five billion, six hundred forty-two million, forty-three thousand, eight hundred seventy-one".