74909398572 has 72 divisors (see below), whose sum is σ = 195966126720. Its totient is φ = 24102063360.

The previous prime is 74909398489. The next prime is 74909398589. The reversal of 74909398572 is 27589390947.

74909398572 is a `hidden beast` number, since 7 + 490 + 9 + 3 + 98 + 57 + 2 = 666.

It is a super-2 number, since 2×74909398572² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 347848 + ... + 520400.

It is an arithmetic number, because the mean of its divisors is an integer number (2721751760).

Almost surely, 2^74909398572 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 74909398572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97983063360).

74909398572 is an abundant number, since it is smaller than the sum of its proper divisors (121056728148).

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

74909398572 is a wasteful number, since it uses less digits than its factorization.

74909398572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172983 (or 172978 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 63.

The spelling of 74909398572 in words is "seventy-four billion, nine hundred nine million, three hundred ninety-eight thousand, five hundred seventy-two".