74868779520 has 800 divisors, whose sum is σ = 291850606080. Its totient is φ = 18274222080.

The previous prime is 74868779519. The next prime is 74868779527. The reversal of 74868779520 is 2597786847.

74868779520 is a `hidden beast` number, since 7 + 48 + 68 + 7 + 7 + 9 + 520 = 666.

It is not an unprimeable number, because it can be changed into a prime (74868779527) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 122134734 + ... + 122135346.

Almost surely, 2^74868779520 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 74868779520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145925303040).

74868779520 is an abundant number, since it is smaller than the sum of its proper divisors (216981826560).

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

74868779520 is a wasteful number, since it uses less digits than its factorization.

74868779520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 47416320, while the sum is 63.

The spelling of 74868779520 in words is "seventy-four billion, eight hundred sixty-eight million, seven hundred seventy-nine thousand, five hundred twenty".