75256489728 has 216 divisors, whose sum is σ = 249510654848. Its totient is φ = 21369194496.

The previous prime is 75256489681. The next prime is 75256489733. The reversal of 75256489728 is 82798465257.

75256489728 is a `hidden beast` number, since 7 + 525 + 6 + 4 + 89 + 7 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 2614551 + ... + 2643177.

Almost surely, 2^75256489728 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 75256489728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124755327424).

75256489728 is an abundant number, since it is smaller than the sum of its proper divisors (174254165120).

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

75256489728 is a wasteful number, since it uses less digits than its factorization.

75256489728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28819 (or 28802 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The spelling of 75256489728 in words is "seventy-five billion, two hundred fifty-six million, four hundred eighty-nine thousand, seven hundred twenty-eight".