74686043520 has 320 divisors, whose sum is σ = 290966599440. Its totient is φ = 18105569280.

The previous prime is 74686043513. The next prime is 74686043521. The reversal of 74686043520 is 2534068647.

74686043520 is a `hidden beast` number, since 7 + 4 + 6 + 8 + 604 + 35 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74686043521) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 504754 + ... + 635726.

Almost surely, 2^74686043520 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 74686043520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145483299720).

74686043520 is an abundant number, since it is smaller than the sum of its proper divisors (216280555920).

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

74686043520 is a wasteful number, since it uses less digits than its factorization.

74686043520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131015 (or 130994 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 74686043520 in words is "seventy-four billion, six hundred eighty-six million, forty-three thousand, five hundred twenty".