7857158715149 has 2 divisors, whose sum is σ = 7857158715150. Its totient is φ = 7857158715148.

The previous prime is 7857158715143. The next prime is 7857158715181. The reversal of 7857158715149 is 9415178517587.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7810448699524 + 46710015625 = 2794718^2 + 216125^2 .

It is a cyclic number.

It is not a de Polignac number, because 7857158715149 - 2²⁰ = 7857157666573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7857158715143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3928579357574 + 3928579357575.

It is an arithmetic number, because the mean of its divisors is an integer number (3928579357575).

Almost surely, 2^{7857158715149} is an apocalyptic number.

It is an amenable number.

7857158715149 is a deficient number, since it is larger than the sum of its proper divisors (1).

7857158715149 is an equidigital number, since it uses as much as digits as its factorization.

7857158715149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784000, while the sum is 68.

The spelling of 7857158715149 in words is "seven trillion, eight hundred fifty-seven billion, one hundred fifty-eight million, seven hundred fifteen thousand, one hundred forty-nine".