842556813 has 12 divisors (see below), whose sum is σ = 1306823040. Its totient is φ = 481460952.

The previous prime is 842556797. The next prime is 842556817. The reversal of 842556813 is 318655248.

It is not a de Polignac number, because 842556813 - 2⁴ = 842556797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842556817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2865693 + ... + 2865986.

It is an arithmetic number, because the mean of its divisors is an integer number (108901920).

Almost surely, 2^842556813 is an apocalyptic number.

It is an amenable number.

842556813 is a deficient number, since it is larger than the sum of its proper divisors (464266227).

842556813 is a wasteful number, since it uses less digits than its factorization.

842556813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731696 (or 5731689 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 842556813 is about 29026.8291930069. The cubic root of 842556813 is about 944.4951487206.

The spelling of 842556813 in words is "eight hundred forty-two million, five hundred fifty-six thousand, eight hundred thirteen".