75681330388 has 24 divisors (see below), whose sum is σ = 141519609000. Its totient is φ = 35287999488.

The previous prime is 75681330383. The next prime is 75681330433. The reversal of 75681330388 is 88303318657.

It can be written as a sum of positive squares in 4 ways, for example, as 15277454404 + 60403875984 = 123602^2 + 245772^2 .

It is a super-2 number, since 2×75681330388² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75681330383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5097913 + ... + 5112736.

It is an arithmetic number, because the mean of its divisors is an integer number (5896650375).

Almost surely, 2^75681330388 is an apocalyptic number.

It is an amenable number.

75681330388 is a deficient number, since it is larger than the sum of its proper divisors (65838278612).

75681330388 is a wasteful number, since it uses less digits than its factorization.

75681330388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10210779 (or 10210777 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 75681330388 in words is "seventy-five billion, six hundred eighty-one million, three hundred thirty thousand, three hundred eighty-eight".