74173019844 has 144 divisors (see below), whose sum is σ = 223287822464. Its totient is φ = 18744929280.

The previous prime is 74173019783. The next prime is 74173019849. The reversal of 74173019844 is 44891037147.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 74173019793 and 74173019802.

It is not an unprimeable number, because it can be changed into a prime (74173019849) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 277452 + ... + 474684.

Almost surely, 2^74173019844 is an apocalyptic number.

74173019844 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74173019844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111643911232).

74173019844 is an abundant number, since it is smaller than the sum of its proper divisors (149114802620).

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

74173019844 is a wasteful number, since it uses less digits than its factorization.

74173019844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197306 (or 197293 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 48.

The spelling of 74173019844 in words is "seventy-four billion, one hundred seventy-three million, nineteen thousand, eight hundred forty-four".