85775642 has 8 divisors (see below), whose sum is σ = 136231956. Its totient is φ = 40364992.

The previous prime is 85775639. The next prime is 85775647. The reversal of 85775642 is 24657758.

It can be written as a sum of positive squares in 2 ways, for example, as 82646281 + 3129361 = 9091^2 + 1769^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 85775593 and 85775602.

It is not an unprimeable number, because it can be changed into a prime (85775647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1261373 + ... + 1261440.

Almost surely, 2^85775642 is an apocalyptic number.

85775642 is a deficient number, since it is larger than the sum of its proper divisors (50456314).

85775642 is a wasteful number, since it uses less digits than its factorization.

85775642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522832.

The product of its digits is 470400, while the sum is 44.

The square root of 85775642 is about 9261.5140230958. The cubic root of 85775642 is about 441.0163180426.

The spelling of 85775642 in words is "eighty-five million, seven hundred seventy-five thousand, six hundred forty-two".