842243651442 has 54 divisors (see below), whose sum is σ = 1835766319023. Its totient is φ = 279080110584.

The previous prime is 842243651441. The next prime is 842243651443. The reversal of 842243651442 is 244156342248.

842243651442 is a `hidden beast` number, since 8 + 42 + 24 + 36 + 514 + 42 = 666.

It is an interprime number because it is at equal distance from previous prime (842243651441) and next prime (842243651443).

It can be written as a sum of positive squares in only one way, i.e., 421121825721 + 421121825721 = 648939^2 + 648939^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=648939.

It is not an unprimeable number, because it can be changed into a prime (842243651441) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 774832623 + ... + 774833709.

Almost surely, 2^842243651442 is an apocalyptic number.

842243651442 is an abundant number, since it is smaller than the sum of its proper divisors (993522667581).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

842243651442 is an equidigital number, since it uses as much as digits as its factorization.

842243651442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580 (or 1291 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 45.

The spelling of 842243651442 in words is "eight hundred forty-two billion, two hundred forty-three million, six hundred fifty-one thousand, four hundred forty-two".