7928642857143 has 4 divisors (see below), whose sum is σ = 10571523809528. Its totient is φ = 5285761904760.

The previous prime is 7928642857123. The next prime is 7928642857189. The reversal of 7928642857143 is 3417582468297.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 7928642857143 - 2¹⁷ = 7928642726071 is a prime.

It is a super-2 number, since 2×7928642857143² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7928642857123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1321440476188 + ... + 1321440476193.

It is an arithmetic number, because the mean of its divisors is an integer number (2642880952382).

Almost surely, 2^{7928642857143} is an apocalyptic number.

7928642857143 is a deficient number, since it is larger than the sum of its proper divisors (2642880952385).

7928642857143 is a wasteful number, since it uses less digits than its factorization.

7928642857143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642880952384.

The product of its digits is 162570240, while the sum is 66.

The spelling of 7928642857143 in words is "seven trillion, nine hundred twenty-eight billion, six hundred forty-two million, eight hundred fifty-seven thousand, one hundred forty-three".