74975401578 has 96 divisors (see below), whose sum is σ = 189410981760. Its totient is φ = 19366300800.

The previous prime is 74975401537. The next prime is 74975401673. The reversal of 74975401578 is 87510457947.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 879088 + ... + 960596.

It is an arithmetic number, because the mean of its divisors is an integer number (1973031060).

Almost surely, 2^74975401578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74975401578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94705490880).

74975401578 is an abundant number, since it is smaller than the sum of its proper divisors (114435580182).

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

74975401578 is a wasteful number, since it uses less digits than its factorization.

74975401578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81724 (or 81713 counting only the distinct ones).

The product of its (nonzero) digits is 9878400, while the sum is 57.

The spelling of 74975401578 in words is "seventy-four billion, nine hundred seventy-five million, four hundred one thousand, five hundred seventy-eight".