89866544212 has 12 divisors (see below), whose sum is σ = 161102219796. Its totient is φ = 43837338560.

The previous prime is 89866544191. The next prime is 89866544213. The reversal of 89866544212 is 21244566898.

It can be written as a sum of positive squares in 2 ways, for example, as 5071433796 + 84795110416 = 71214^2 + 291196^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89866544213) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273983203 + ... + 273983530.

It is an arithmetic number, because the mean of its divisors is an integer number (13425184983).

Almost surely, 2^89866544212 is an apocalyptic number.

89866544212 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

89866544212 is a deficient number, since it is larger than the sum of its proper divisors (71235675584).

89866544212 is a wasteful number, since it uses less digits than its factorization.

89866544212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547966778 (or 547966776 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 55.

The spelling of 89866544212 in words is "eighty-nine billion, eight hundred sixty-six million, five hundred forty-four thousand, two hundred twelve".