89427156561 has 24 divisors (see below), whose sum is σ = 130385060520. Its totient is φ = 59058720000.

The previous prime is 89427156551. The next prime is 89427156583. The reversal of 89427156561 is 16565172498.

It is a happy number.

89427156561 is a `hidden beast` number, since 8 + 9 + 4 + 2 + 71 + 5 + 6 + 561 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 25590080961 + 63837075600 = 159969^2 + 252660^2 .

It is not a de Polignac number, because 89427156561 - 2²² = 89422962257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 89427156498 and 89427156507.

It is not an unprimeable number, because it can be changed into a prime (89427156551) 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, 8510811 + ... + 8521311.

It is an arithmetic number, because the mean of its divisors is an integer number (5432710855).

Almost surely, 2^89427156561 is an apocalyptic number.

It is an amenable number.

89427156561 is a deficient number, since it is larger than the sum of its proper divisors (40957903959).

89427156561 is a wasteful number, since it uses less digits than its factorization.

89427156561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19297 (or 19294 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 89427156561 in words is "eighty-nine billion, four hundred twenty-seven million, one hundred fifty-six thousand, five hundred sixty-one".