64687029109 has 2 divisors, whose sum is σ = 64687029110. Its totient is φ = 64687029108.

The previous prime is 64687029091. The next prime is 64687029241. The reversal of 64687029109 is 90192078646.

It is a happy number.

Together with previous prime (64687029091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52680348484 + 12006680625 = 229522^2 + 109575^2 .

It is a cyclic number.

It is not a de Polignac number, because 64687029109 - 2⁷ = 64687028981 is a prime.

It is a super-2 number, since 2×64687029109² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64687029509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32343514554 + 32343514555.

It is an arithmetic number, because the mean of its divisors is an integer number (32343514555).

Almost surely, 2^64687029109 is an apocalyptic number.

It is an amenable number.

64687029109 is a deficient number, since it is larger than the sum of its proper divisors (1).

64687029109 is an equidigital number, since it uses as much as digits as its factorization.

64687029109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 64687029109 in words is "sixty-four billion, six hundred eighty-seven million, twenty-nine thousand, one hundred nine".