74974121280 has 168 divisors, whose sum is σ = 258267369672. Its totient is φ = 19963047936.

The previous prime is 74974121267. The next prime is 74974121291. The reversal of 74974121280 is 8212147947.

74974121280 is a `hidden beast` number, since 74 + 97 + 412 + 1 + 2 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 30175858944 + 44798262336 = 173712^2 + 211656^2 .

It is a super-2 number, since 2×74974121280² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

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, 1930534 + ... + 1968986.

Almost surely, 2^74974121280 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 74974121280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129133684836).

74974121280 is an abundant number, since it is smaller than the sum of its proper divisors (183293248392).

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

74974121280 is a wasteful number, since it uses less digits than its factorization.

74974121280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39153 (or 39140 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 74974121280 in words is "seventy-four billion, nine hundred seventy-four million, one hundred twenty-one thousand, two hundred eighty".