74128633722 has 384 divisors, whose sum is σ = 211982883840. Its totient is φ = 18341406720.

The previous prime is 74128633717. The next prime is 74128633753. The reversal of 74128633722 is 22733682147.

74128633722 is a `hidden beast` number, since 7 + 4 + 1 + 2 + 8 + 633 + 7 + 2 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 135518253 + ... + 135518799.

It is an arithmetic number, because the mean of its divisors is an integer number (552038760).

Almost surely, 2^74128633722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74128633722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105991441920).

74128633722 is an abundant number, since it is smaller than the sum of its proper divisors (137854250118).

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

74128633722 is a wasteful number, since it uses less digits than its factorization.

74128633722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 775 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The spelling of 74128633722 in words is "seventy-four billion, one hundred twenty-eight million, six hundred thirty-three thousand, seven hundred twenty-two".