85551816 has 64 divisors (see below), whose sum is σ = 252334080. Its totient is φ = 23653440.

The previous prime is 85551761. The next prime is 85551821. The reversal of 85551816 is 61815558.

It is a super-2 number, since 2×85551816² = 14638226441795712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3006 + ... + 13421.

It is an arithmetic number, because the mean of its divisors is an integer number (3942720).

Almost surely, 2^85551816 is an apocalyptic number.

It is an amenable number.

85551816 is an abundant number, since it is smaller than the sum of its proper divisors (166782264).

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

85551816 is a wasteful number, since it uses less digits than its factorization.

85551816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16474 (or 16470 counting only the distinct ones).

The product of its digits is 48000, while the sum is 39.

The square root of 85551816 is about 9249.4224684572. The cubic root of 85551816 is about 440.6323826941.

The spelling of 85551816 in words is "eighty-five million, five hundred fifty-one thousand, eight hundred sixteen".