85144449555 has 24 divisors (see below), whose sum is σ = 161000414640. Its totient is φ = 41282157120.

The previous prime is 85144449539. The next prime is 85144449569. The reversal of 85144449555 is 55594444158.

It is a happy number.

85144449555 is a `hidden beast` number, since 8 + 5 + 1 + 4 + 44 + 49 + 555 = 666.

It is not a de Polignac number, because 85144449555 - 2⁴ = 85144449539 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86004000 + ... + 86004989.

It is an arithmetic number, because the mean of its divisors is an integer number (6708350610).

Almost surely, 2^85144449555 is an apocalyptic number.

85144449555 is a deficient number, since it is larger than the sum of its proper divisors (75855965085).

85144449555 is a wasteful number, since it uses less digits than its factorization.

85144449555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172009011 (or 172009008 counting only the distinct ones).

The product of its digits is 11520000, while the sum is 54.

The spelling of 85144449555 in words is "eighty-five billion, one hundred forty-four million, four hundred forty-nine thousand, five hundred fifty-five".