7143642881 has 2 divisors, whose sum is σ = 7143642882. Its totient is φ = 7143642880.

The previous prime is 7143642859. The next prime is 7143642901. The reversal of 7143642881 is 1882463417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7132647025 + 10995856 = 84455^2 + 3316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7143642881 is a prime.

It is a super-2 number, since 2×7143642881² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7143642851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3571821440 + 3571821441.

It is an arithmetic number, because the mean of its divisors is an integer number (3571821441).

Almost surely, 2^7143642881 is an apocalyptic number.

It is an amenable number.

7143642881 is a deficient number, since it is larger than the sum of its proper divisors (1).

7143642881 is an equidigital number, since it uses as much as digits as its factorization.

7143642881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 44.

The square root of 7143642881 is about 84520.0738345631. The cubic root of 7143642881 is about 1925.9273998579.

The spelling of 7143642881 in words is "seven billion, one hundred forty-three million, six hundred forty-two thousand, eight hundred eighty-one".