74902724520 has 512 divisors, whose sum is σ = 263065743360. Its totient is φ = 16920576000.

The previous prime is 74902724503. The next prime is 74902724543. The reversal of 74902724520 is 2542720947.

It is a super-2 number, since 2×74902724520² (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 127 ways as a sum of consecutive naturals, for example, 73361610 + ... + 73362630.

It is an arithmetic number, because the mean of its divisors is an integer number (513800280).

Almost surely, 2^74902724520 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 74902724520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131532871680).

74902724520 is an abundant number, since it is smaller than the sum of its proper divisors (188163018840).

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

74902724520 is a wasteful number, since it uses less digits than its factorization.

74902724520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157 (or 1153 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 74902724520 in words is "seventy-four billion, nine hundred two million, seven hundred twenty-four thousand, five hundred twenty".