85560778 has 4 divisors (see below), whose sum is σ = 128341170. Its totient is φ = 42780388.

The previous prime is 85560757. The next prime is 85560791. The reversal of 85560778 is 87706558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87706558 = 2 ⋅43853279.

It can be written as a sum of positive squares in only one way, i.e., 62299449 + 23261329 = 7893^2 + 4823^2 .

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 as a sum of consecutive naturals, namely, 21390193 + ... + 21390196.

Almost surely, 2^85560778 is an apocalyptic number.

85560778 is a deficient number, since it is larger than the sum of its proper divisors (42780392).

85560778 is a wasteful number, since it uses less digits than its factorization.

85560778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42780391.

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 85560778 is about 9249.9069184506. The cubic root of 85560778 is about 440.6477683388.

The spelling of 85560778 in words is "eighty-five million, five hundred sixty thousand, seven hundred seventy-eight".