75515985 has 12 divisors (see below), whose sum is σ = 130894452. Its totient is φ = 40275168.

The previous prime is 75515977. The next prime is 75516053. The reversal of 75515985 is 58951557.

75515985 is a `hidden beast` number, since 7 + 5 + 51 + 598 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10342656 + 65173329 = 3216^2 + 8073^2 .

It is not a de Polignac number, because 75515985 - 2³ = 75515977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1678133 = 75515985 / (7 + 5 + 5 + 1 + 5 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 75515985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 839022 + ... + 839111.

It is an arithmetic number, because the mean of its divisors is an integer number (10907871).

Almost surely, 2^75515985 is an apocalyptic number.

It is an amenable number.

75515985 is a deficient number, since it is larger than the sum of its proper divisors (55378467).

75515985 is a wasteful number, since it uses less digits than its factorization.

75515985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678144 (or 1678141 counting only the distinct ones).

The product of its digits is 315000, while the sum is 45.

The square root of 75515985 is about 8689.9933831966. The cubic root of 75515985 is about 422.6812312609.

The spelling of 75515985 in words is "seventy-five million, five hundred fifteen thousand, nine hundred eighty-five".