842157264187 has 2 divisors, whose sum is σ = 842157264188. Its totient is φ = 842157264186.

The previous prime is 842157264119. The next prime is 842157264233. The reversal of 842157264187 is 781462751248.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 842157264187 - 2¹⁹ = 842156739899 is a prime.

It is not a weakly prime, because it can be changed into another prime (842157267187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421078632093 + 421078632094.

It is an arithmetic number, because the mean of its divisors is an integer number (421078632094).

Almost surely, 2^842157264187 is an apocalyptic number.

842157264187 is a deficient number, since it is larger than the sum of its proper divisors (1).

842157264187 is an equidigital number, since it uses as much as digits as its factorization.

842157264187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6021120, while the sum is 55.

The spelling of 842157264187 in words is "eight hundred forty-two billion, one hundred fifty-seven million, two hundred sixty-four thousand, one hundred eighty-seven".