74404861820 has 12 divisors (see below), whose sum is σ = 156250209864. Its totient is φ = 29761944720.

The previous prime is 74404861777. The next prime is 74404861829. The reversal of 74404861820 is 2816840447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74404861829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1860121526 + ... + 1860121565.

It is an arithmetic number, because the mean of its divisors is an integer number (13020850822).

Almost surely, 2^74404861820 is an apocalyptic number.

It is an amenable number.

74404861820 is an abundant number, since it is smaller than the sum of its proper divisors (81845348044).

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

74404861820 is a wasteful number, since it uses less digits than its factorization.

74404861820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3720243100 (or 3720243098 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 44.

The spelling of 74404861820 in words is "seventy-four billion, four hundred four million, eight hundred sixty-one thousand, eight hundred twenty".