85255564890 has 32 divisors (see below), whose sum is σ = 205968422016. Its totient is φ = 22584254400.

The previous prime is 85255564843. The next prime is 85255564921. The reversal of 85255564890 is 9846555258.

It is a happy number.

It is a super-2 number, since 2×85255564890² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85255564890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9405577 + ... + 9414636.

It is an arithmetic number, because the mean of its divisors is an integer number (6436513188).

Almost surely, 2^85255564890 is an apocalyptic number.

85255564890 is an abundant number, since it is smaller than the sum of its proper divisors (120712857126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85255564890 is a wasteful number, since it uses less digits than its factorization.

85255564890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18820374.

The product of its (nonzero) digits is 17280000, while the sum is 57.

The spelling of 85255564890 in words is "eighty-five billion, two hundred fifty-five million, five hundred sixty-four thousand, eight hundred ninety".