89427545521 has 2 divisors, whose sum is σ = 89427545522. Its totient is φ = 89427545520.

The previous prime is 89427545509. The next prime is 89427545563. The reversal of 89427545521 is 12554572498.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67275390625 + 22152154896 = 259375^2 + 148836^2 .

It is a cyclic number.

It is not a de Polignac number, because 89427545521 - 2⁷ = 89427545393 is a prime.

It is a super-2 number, since 2×89427545521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89427525521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44713772760 + 44713772761.

It is an arithmetic number, because the mean of its divisors is an integer number (44713772761).

Almost surely, 2^89427545521 is an apocalyptic number.

It is an amenable number.

89427545521 is a deficient number, since it is larger than the sum of its proper divisors (1).

89427545521 is an equidigital number, since it uses as much as digits as its factorization.

89427545521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032000, while the sum is 52.

The spelling of 89427545521 in words is "eighty-nine billion, four hundred twenty-seven million, five hundred forty-five thousand, five hundred twenty-one".