89428134681 has 24 divisors (see below), whose sum is σ = 133015388480. Its totient is φ = 57854303136.

The previous prime is 89428134671. The next prime is 89428134683. The reversal of 89428134681 is 18643182498.

It is a happy number.

89428134681 is a `hidden beast` number, since 8 + 9 + 428 + 134 + 6 + 81 = 666.

It is not a de Polignac number, because 89428134681 - 2⁶ = 89428134617 is a prime.

It is a super-2 number, since 2×89428134681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89428134683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228085 + ... + 480498.

Almost surely, 2^89428134681 is an apocalyptic number.

It is an amenable number.

89428134681 is a deficient number, since it is larger than the sum of its proper divisors (43587253799).

89428134681 is a wasteful number, since it uses less digits than its factorization.

89428134681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709005 (or 709002 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 54.

The spelling of 89428134681 in words is "eighty-nine billion, four hundred twenty-eight million, one hundred thirty-four thousand, six hundred eighty-one".