85564554 has 16 divisors (see below), whose sum is σ = 178569792. Its totient is φ = 27281408.

The previous prime is 85564489. The next prime is 85564559. The reversal of 85564554 is 45546558.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85564559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 309879 + ... + 310154.

It is an arithmetic number, because the mean of its divisors is an integer number (11160612).

Almost surely, 2^85564554 is an apocalyptic number.

85564554 is an abundant number, since it is smaller than the sum of its proper divisors (93005238).

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

85564554 is a wasteful number, since it uses less digits than its factorization.

85564554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620061.

The product of its digits is 480000, while the sum is 42.

The square root of 85564554 is about 9250.1110263607. Note that the first 3 decimals coincide. The cubic root of 85564554 is about 440.6542505203.

The spelling of 85564554 in words is "eighty-five million, five hundred sixty-four thousand, five hundred fifty-four".