7857857864293 has 2 divisors, whose sum is σ = 7857857864294. Its totient is φ = 7857857864292.

The previous prime is 7857857864291. The next prime is 7857857864299. The reversal of 7857857864293 is 3924687587587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6947478541249 + 910379323044 = 2635807^2 + 954138^2 .

It is a cyclic number.

It is not a de Polignac number, because 7857857864293 - 2¹ = 7857857864291 is a prime.

Together with 7857857864291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7857857864291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3928928932146 + 3928928932147.

It is an arithmetic number, because the mean of its divisors is an integer number (3928928932147).

Almost surely, 2^{7857857864293} is an apocalyptic number.

It is an amenable number.

7857857864293 is a deficient number, since it is larger than the sum of its proper divisors (1).

7857857864293 is an equidigital number, since it uses as much as digits as its factorization.

7857857864293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5689958400, while the sum is 79.

The spelling of 7857857864293 in words is "seven trillion, eight hundred fifty-seven billion, eight hundred fifty-seven million, eight hundred sixty-four thousand, two hundred ninety-three".