842157267187 has 2 divisors, whose sum is σ = 842157267188. Its totient is φ = 842157267186.

The previous prime is 842157267181. The next prime is 842157267197. The reversal of 842157267187 is 781762751248.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 842157267187 - 2²³ = 842148878579 is a prime.

It is a super-2 number, since 2×842157267187² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (842157267181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421078633593 + 421078633594.

It is an arithmetic number, because the mean of its divisors is an integer number (421078633594).

Almost surely, 2^842157267187 is an apocalyptic number.

842157267187 is a deficient number, since it is larger than the sum of its proper divisors (1).

842157267187 is an equidigital number, since it uses as much as digits as its factorization.

842157267187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10536960, while the sum is 58.

The spelling of 842157267187 in words is "eight hundred forty-two billion, one hundred fifty-seven million, two hundred sixty-seven thousand, one hundred eighty-seven".