74383205778 has 96 divisors (see below), whose sum is σ = 185465629440. Its totient is φ = 21105152640.

The previous prime is 74383205777. The next prime is 74383205791. The reversal of 74383205778 is 87750238347.

It is a happy number.

74383205778 is a `hidden beast` number, since 7 + 4 + 38 + 32 + 0 + 577 + 8 = 666.

It is a super-2 number, since 2×74383205778² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74383205777) 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, 19999003 + ... + 20002721.

It is an arithmetic number, because the mean of its divisors is an integer number (1931933640).

Almost surely, 2^74383205778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74383205778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92732814720).

74383205778 is an abundant number, since it is smaller than the sum of its proper divisors (111082423662).

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

74383205778 is a wasteful number, since it uses less digits than its factorization.

74383205778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4792 (or 4789 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 54.

The spelling of 74383205778 in words is "seventy-four billion, three hundred eighty-three million, two hundred five thousand, seven hundred seventy-eight".