85890928778 has 8 divisors (see below), whose sum is σ = 128842016772. Its totient is φ = 42943589856.

The previous prime is 85890928723. The next prime is 85890928811. The reversal of 85890928778 is 87782909858.

It can be written as a sum of positive squares in 2 ways, for example, as 76946876449 + 8944052329 = 277393^2 + 94573^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879275 + ... + 972062.

Almost surely, 2^85890928778 is an apocalyptic number.

85890928778 is a deficient number, since it is larger than the sum of its proper divisors (42951087994).

85890928778 is a wasteful number, since it uses less digits than its factorization.

85890928778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874536.

The product of its (nonzero) digits is 162570240, while the sum is 71.

The spelling of 85890928778 in words is "eighty-five billion, eight hundred ninety million, nine hundred twenty-eight thousand, seven hundred seventy-eight".