85181616 has 60 divisors (see below), whose sum is σ = 256733568. Its totient is φ = 26209152.

The previous prime is 85181587. The next prime is 85181639. The reversal of 85181616 is 61618158.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20880 + ... + 24623.

Almost surely, 2^85181616 is an apocalyptic number.

It is an amenable number.

85181616 is an abundant number, since it is smaller than the sum of its proper divisors (171551952).

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

85181616 is a wasteful number, since it uses less digits than its factorization.

85181616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45530 (or 45521 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 85181616 is about 9229.3887121521. The cubic root of 85181616 is about 439.9958952785.

The spelling of 85181616 in words is "eighty-five million, one hundred eighty-one thousand, six hundred sixteen".