64089949481 has 2 divisors, whose sum is σ = 64089949482. Its totient is φ = 64089949480.

The previous prime is 64089949423. The next prime is 64089949519. The reversal of 64089949481 is 18494998046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63937673881 + 152275600 = 252859^2 + 12340^2 .

It is a cyclic number.

It is not a de Polignac number, because 64089949481 - 2²⁶ = 64022840617 is a prime.

It is a super-2 number, since 2×64089949481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64089949381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32044974740 + 32044974741.

It is an arithmetic number, because the mean of its divisors is an integer number (32044974741).

Almost surely, 2^64089949481 is an apocalyptic number.

It is an amenable number.

64089949481 is a deficient number, since it is larger than the sum of its proper divisors (1).

64089949481 is an equidigital number, since it uses as much as digits as its factorization.

64089949481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17915904, while the sum is 62.

The spelling of 64089949481 in words is "sixty-four billion, eighty-nine million, nine hundred forty-nine thousand, four hundred eighty-one".