64532765089 has 9 divisors (see below), whose sum is σ = 69882250809. Its totient is φ = 59565657840.

The previous prime is 64532765071. The next prime is 64532765117. The reversal of 64532765089 is 98056723546.

The square root of 64532765089 is 254033.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 23893430625 + 40639334464 = 154575^2 + 201592^2 .

It is not a de Polignac number, because 64532765089 - 2¹⁷ = 64532634017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64532765029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3292659 + ... + 3312199.

Almost surely, 2^64532765089 is an apocalyptic number.

64532765089 is the 254033-rd square number.

64532765089 is the 127017-th centered octagonal number.

It is an amenable number.

64532765089 is a deficient number, since it is larger than the sum of its proper divisors (5349485720).

64532765089 is an frugal number, since it uses more digits than its factorization.

64532765089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39108 (or 19554 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 64532765089 in words is "sixty-four billion, five hundred thirty-two million, seven hundred sixty-five thousand, eighty-nine".