64539000749 has 2 divisors, whose sum is σ = 64539000750. Its totient is φ = 64539000748.

The previous prime is 64539000737. The next prime is 64539000769. The reversal of 64539000749 is 94700093546.

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., 63509040100 + 1029960649 = 252010^2 + 32093^2 .

It is a cyclic number.

It is not a de Polignac number, because 64539000749 - 2²⁴ = 64522223533 is a prime.

It is a super-2 number, since 2×64539000749² (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 (64539000769) 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, 32269500374 + 32269500375.

It is an arithmetic number, because the mean of its divisors is an integer number (32269500375).

Almost surely, 2^64539000749 is an apocalyptic number.

It is an amenable number.

64539000749 is a deficient number, since it is larger than the sum of its proper divisors (1).

64539000749 is an equidigital number, since it uses as much as digits as its factorization.

64539000749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 47.

The spelling of 64539000749 in words is "sixty-four billion, five hundred thirty-nine million, seven hundred forty-nine", and thus it is an aban number.