89545237812 has 18 divisors (see below), whose sum is σ = 226350462338. Its totient is φ = 29848412592.

The previous prime is 89545237801. The next prime is 89545237871. The reversal of 89545237812 is 21873254598.

89545237812 is a `hidden beast` number, since 8 + 9 + 545 + 23 + 78 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 58203492516 + 31341745296 = 241254^2 + 177036^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×89545237812² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1243683823 + ... + 1243683894.

Almost surely, 2^89545237812 is an apocalyptic number.

It is an amenable number.

89545237812 is an abundant number, since it is smaller than the sum of its proper divisors (136805224526).

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

89545237812 is a wasteful number, since it uses less digits than its factorization.

89545237812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487367727 (or 2487367722 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The spelling of 89545237812 in words is "eighty-nine billion, five hundred forty-five million, two hundred thirty-seven thousand, eight hundred twelve".