75528221474 has 8 divisors (see below), whose sum is σ = 113349069468. Its totient is φ = 37745198320.

The previous prime is 75528221453. The next prime is 75528221477. The reversal of 75528221474 is 47412282557.

It can be written as a sum of positive squares in 2 ways, for example, as 65565187249 + 9963034225 = 256057^2 + 99815^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (75528221477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9451217 + ... + 9459204.

Almost surely, 2^75528221474 is an apocalyptic number.

75528221474 is a deficient number, since it is larger than the sum of its proper divisors (37820847994).

75528221474 is a wasteful number, since it uses less digits than its factorization.

75528221474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18912420.

The product of its digits is 1254400, while the sum is 47.

The spelling of 75528221474 in words is "seventy-five billion, five hundred twenty-eight million, two hundred twenty-one thousand, four hundred seventy-four".