74978940128 has 96 divisors (see below), whose sum is σ = 153743466240. Its totient is φ = 35956224000.

The previous prime is 74978940107. The next prime is 74978940131. The reversal of 74978940128 is 82104987947.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73436258 + ... + 73437278.

It is an arithmetic number, because the mean of its divisors is an integer number (1601494440).

Almost surely, 2^74978940128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74978940128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76871733120).

74978940128 is an abundant number, since it is smaller than the sum of its proper divisors (78764526112).

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

74978940128 is a wasteful number, since it uses less digits than its factorization.

74978940128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1644 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 59.

The spelling of 74978940128 in words is "seventy-four billion, nine hundred seventy-eight million, nine hundred forty thousand, one hundred twenty-eight".