42121361826 has 16 divisors (see below), whose sum is σ = 93603026400. Its totient is φ = 14040453924.

The previous prime is 42121361797. The next prime is 42121361851. The reversal of 42121361826 is 62816312124.

It is a happy number.

42121361826 is a `hidden beast` number, since 4 + 2 + 1 + 2 + 13 + 618 + 26 = 666.

42121361826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390012556 + ... + 390012663.

It is an arithmetic number, because the mean of its divisors is an integer number (5850189150).

Almost surely, 2^42121361826 is an apocalyptic number.

42121361826 is an abundant number, since it is smaller than the sum of its proper divisors (51481664574).

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

42121361826 is a wasteful number, since it uses less digits than its factorization.

42121361826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780025230 (or 780025224 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The spelling of 42121361826 in words is "forty-two billion, one hundred twenty-one million, three hundred sixty-one thousand, eight hundred twenty-six".