74074331520 has 896 divisors, whose sum is σ = 312142962240. Its totient is φ = 16446799872.

The previous prime is 74074331431. The next prime is 74074331521. The reversal of 74074331520 is 2513347047.

74074331520 is a `hidden beast` number, since 74 + 0 + 7 + 433 + 152 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (896).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74074331521) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 120838734 + ... + 120839346.

Almost surely, 2^74074331520 is an apocalyptic number.

74074331520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74074331520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156071481120).

74074331520 is an abundant number, since it is smaller than the sum of its proper divisors (238068630720).

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

74074331520 is an equidigital number, since it uses as much as digits as its factorization.

74074331520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 36.

Adding to 74074331520 its sum of digits (36), we get a square (74074331556 = 272166²).

Adding to 74074331520 its reverse (2513347047), we get a palindrome (76587678567).

The spelling of 74074331520 in words is "seventy-four billion, seventy-four million, three hundred thirty-one thousand, five hundred twenty".