74894839920 has 320 divisors, whose sum is σ = 272232576000. Its totient is φ = 18873160704.

The previous prime is 74894839919. The next prime is 74894839961. The reversal of 74894839920 is 2993849847.

74894839920 is a `hidden beast` number, since 7 + 48 + 9 + 483 + 99 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18014482 + ... + 18018638.

It is an arithmetic number, because the mean of its divisors is an integer number (850726800).

Almost surely, 2^74894839920 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 74894839920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136116288000).

74894839920 is an abundant number, since it is smaller than the sum of its proper divisors (197337736080).

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

74894839920 is a wasteful number, since it uses less digits than its factorization.

74894839920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4637 (or 4625 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 74894839920 in words is "seventy-four billion, eight hundred ninety-four million, eight hundred thirty-nine thousand, nine hundred twenty".