7857143643 has 32 divisors (see below), whose sum is σ = 11269103616. Its totient is φ = 4857705248.

The previous prime is 7857143639. The next prime is 7857143647. The reversal of 7857143643 is 3463417587.

7857143643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7857143639) and next prime (7857143647).

It is not a de Polignac number, because 7857143643 - 2² = 7857143639 is a prime.

It is a super-2 number, since 2×7857143643² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7857143592 and 7857143601.

It is not an unprimeable number, because it can be changed into a prime (7857143647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 335680 + ... + 358322.

It is an arithmetic number, because the mean of its divisors is an integer number (352159488).

Almost surely, 2^7857143643 is an apocalyptic number.

7857143643 is a deficient number, since it is larger than the sum of its proper divisors (3411959973).

7857143643 is a wasteful number, since it uses less digits than its factorization.

7857143643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22823.

The product of its digits is 1693440, while the sum is 48.

The square root of 7857143643 is about 88640.5304756238. The cubic root of 7857143643 is about 1988.0237312238.

The spelling of 7857143643 in words is "seven billion, eight hundred fifty-seven million, one hundred forty-three thousand, six hundred forty-three".