7859864541643 has 4 divisors (see below), whose sum is σ = 8201597782608. Its totient is φ = 7518131300680.

The previous prime is 7859864541637. The next prime is 7859864541703. The reversal of 7859864541643 is 3461454689587.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7859864541643 is a prime.

It is a super-2 number, since 2×7859864541643² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7859864541443) 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, 170866620448 + ... + 170866620493.

It is an arithmetic number, because the mean of its divisors is an integer number (2050399445652).

Almost surely, 2^{7859864541643} is an apocalyptic number.

7859864541643 is a deficient number, since it is larger than the sum of its proper divisors (341733240965).

7859864541643 is a wasteful number, since it uses less digits than its factorization.

7859864541643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341733240964.

The product of its digits is 696729600, while the sum is 70.

The spelling of 7859864541643 in words is "seven trillion, eight hundred fifty-nine billion, eight hundred sixty-four million, five hundred forty-one thousand, six hundred forty-three".