64537635889 has 2 divisors, whose sum is σ = 64537635890. Its totient is φ = 64537635888.

The previous prime is 64537635859. The next prime is 64537635919. The reversal of 64537635889 is 98853673546.

64537635889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (64537635859) and next prime (64537635919).

It can be written as a sum of positive squares in only one way, i.e., 38943075600 + 25594560289 = 197340^2 + 159983^2 .

It is a cyclic number.

It is not a de Polignac number, because 64537635889 - 2⁷ = 64537635761 is a prime.

It is a super-2 number, since 2×64537635889² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64537635889.

It is not a weakly prime, because it can be changed into another prime (64537635809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32268817944 + 32268817945.

It is an arithmetic number, because the mean of its divisors is an integer number (32268817945).

Almost surely, 2^64537635889 is an apocalyptic number.

It is an amenable number.

64537635889 is a deficient number, since it is larger than the sum of its proper divisors (1).

64537635889 is an equidigital number, since it uses as much as digits as its factorization.

64537635889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 130636800, while the sum is 64.

The spelling of 64537635889 in words is "sixty-four billion, five hundred thirty-seven million, six hundred thirty-five thousand, eight hundred eighty-nine".