64106507149 has 2 divisors, whose sum is σ = 64106507150. Its totient is φ = 64106507148.

The previous prime is 64106507147. The next prime is 64106507207. The reversal of 64106507149 is 94170560146.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49297320900 + 14809186249 = 222030^2 + 121693^2 .

It is a cyclic number.

It is not a de Polignac number, because 64106507149 - 2¹ = 64106507147 is a prime.

Together with 64106507147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64106507147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32053253574 + 32053253575.

It is an arithmetic number, because the mean of its divisors is an integer number (32053253575).

Almost surely, 2^64106507149 is an apocalyptic number.

It is an amenable number.

64106507149 is a deficient number, since it is larger than the sum of its proper divisors (1).

64106507149 is an equidigital number, since it uses as much as digits as its factorization.

64106507149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 64106507149 in words is "sixty-four billion, one hundred six million, five hundred seven thousand, one hundred forty-nine".