75815642 has 24 divisors (see below), whose sum is σ = 135524340. Its totient is φ = 31698240.

The previous prime is 75815639. The next prime is 75815671. The reversal of 75815642 is 24651857.

It can be written as a sum of positive squares in 2 ways, for example, as 75707401 + 108241 = 8701^2 + 329^2 .

It is a junction number, because it is equal to n+sod(n) for n = 75815596 and 75815605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5417 + ... + 13452.

Almost surely, 2^75815642 is an apocalyptic number.

75815642 is a deficient number, since it is larger than the sum of its proper divisors (59708698).

75815642 is a wasteful number, since it uses less digits than its factorization.

75815642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18926 (or 18919 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 75815642 is about 8707.2178105294. The cubic root of 75815642 is about 423.2395776144.

The spelling of 75815642 in words is "seventy-five million, eight hundred fifteen thousand, six hundred forty-two".