842621186851 has 2 divisors, whose sum is σ = 842621186852. Its totient is φ = 842621186850.

The previous prime is 842621186843. The next prime is 842621186857. The reversal of 842621186851 is 158681126248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 842621186851 - 2³ = 842621186843 is a prime.

It is not a weakly prime, because it can be changed into another prime (842621186857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421310593425 + 421310593426.

It is an arithmetic number, because the mean of its divisors is an integer number (421310593426).

Almost surely, 2^842621186851 is an apocalyptic number.

842621186851 is a deficient number, since it is larger than the sum of its proper divisors (1).

842621186851 is an equidigital number, since it uses as much as digits as its factorization.

842621186851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1474560, while the sum is 52.

The spelling of 842621186851 in words is "eight hundred forty-two billion, six hundred twenty-one million, one hundred eighty-six thousand, eight hundred fifty-one".