7857142865 has 48 divisors (see below), whose sum is σ = 11748475200. Its totient is φ = 4997013120.

The previous prime is 7857142831. The next prime is 7857142877. The reversal of 7857142865 is 5682417587.

It is not a de Polignac number, because 7857142865 - 2⁶ = 7857142801 is a prime.

It is a super-3 number, since 3×7857142865³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123146 + ... + 175724.

It is an arithmetic number, because the mean of its divisors is an integer number (244759900).

Almost surely, 2^7857142865 is an apocalyptic number.

It is an amenable number.

7857142865 is a deficient number, since it is larger than the sum of its proper divisors (3891332335).

7857142865 is a wasteful number, since it uses less digits than its factorization.

7857142865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52638 (or 52627 counting only the distinct ones).

The product of its digits is 3763200, while the sum is 53.

The square root of 7857142865 is about 88640.5260871121. The cubic root of 7857142865 is about 1988.0236656070.

The spelling of 7857142865 in words is "seven billion, eight hundred fifty-seven million, one hundred forty-two thousand, eight hundred sixty-five".