7881826842 has 48 divisors (see below), whose sum is σ = 17559364680. Its totient is φ = 2554022016.

The previous prime is 7881826793. The next prime is 7881826847. The reversal of 7881826842 is 2486281887.

It can be written as a sum of positive squares in 4 ways, for example, as 7865738721 + 16088121 = 88689^2 + 4011^2 .

It is not an unprimeable number, because it can be changed into a prime (7881826847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66088 + ... + 141884.

Almost surely, 2^7881826842 is an apocalyptic number.

7881826842 is an abundant number, since it is smaller than the sum of its proper divisors (9677537838).

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

7881826842 is a wasteful number, since it uses less digits than its factorization.

7881826842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75967 (or 75964 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 54.

The square root of 7881826842 is about 88779.6533108797. The cubic root of 7881826842 is about 1990.1033457267.

The spelling of 7881826842 in words is "seven billion, eight hundred eighty-one million, eight hundred twenty-six thousand, eight hundred forty-two".