64519055501 has 2 divisors, whose sum is σ = 64519055502. Its totient is φ = 64519055500.

The previous prime is 64519055453. The next prime is 64519055519. The reversal of 64519055501 is 10555091546.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61169655625 + 3349399876 = 247325^2 + 57874^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64519055501 is a prime.

It is a super-2 number, since 2×64519055501² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64519055201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32259527750 + 32259527751.

It is an arithmetic number, because the mean of its divisors is an integer number (32259527751).

Almost surely, 2^64519055501 is an apocalyptic number.

It is an amenable number.

64519055501 is a deficient number, since it is larger than the sum of its proper divisors (1).

64519055501 is an equidigital number, since it uses as much as digits as its factorization.

64519055501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 64519055501 in words is "sixty-four billion, five hundred nineteen million, fifty-five thousand, five hundred one".