85655564 has 6 divisors (see below), whose sum is σ = 149897244. Its totient is φ = 42827780.

The previous prime is 85655561. The next prime is 85655567. The reversal of 85655564 is 46555658.

It is an interprime number because it is at equal distance from previous prime (85655561) and next prime (85655567).

It is not an unprimeable number, because it can be changed into a prime (85655561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10706942 + ... + 10706949.

It is an arithmetic number, because the mean of its divisors is an integer number (24982874).

Almost surely, 2^85655564 is an apocalyptic number.

It is an amenable number.

85655564 is a deficient number, since it is larger than the sum of its proper divisors (64241680).

85655564 is a wasteful number, since it uses less digits than its factorization.

85655564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21413895 (or 21413893 counting only the distinct ones).

The product of its digits is 720000, while the sum is 44.

The square root of 85655564 is about 9255.0291193491. The cubic root of 85655564 is about 440.8104278591.

The spelling of 85655564 in words is "eighty-five million, six hundred fifty-five thousand, five hundred sixty-four".