7142857864 has 32 divisors (see below), whose sum is σ = 13598214840. Its totient is φ = 3516825600.

The previous prime is 7142857849. The next prime is 7142857871. The reversal of 7142857864 is 4687582417.

It can be written as a sum of positive squares in 4 ways, for example, as 6494748100 + 648109764 = 80590^2 + 25458^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364804 + ... + 383884.

Almost surely, 2^7142857864 is an apocalyptic number.

It is an amenable number.

7142857864 is a deficient number, since it is larger than the sum of its proper divisors (6455356976).

7142857864 is a wasteful number, since it uses less digits than its factorization.

7142857864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19801 (or 19797 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 52.

The square root of 7142857864 is about 84515.4297391902. The cubic root of 7142857864 is about 1925.8568503657.

The spelling of 7142857864 in words is "seven billion, one hundred forty-two million, eight hundred fifty-seven thousand, eight hundred sixty-four".