64777487519 has 2 divisors, whose sum is σ = 64777487520. Its totient is φ = 64777487518.

The previous prime is 64777487491. The next prime is 64777487521. The reversal of 64777487519 is 91578477746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64777487519 - 2²⁸ = 64509052063 is a prime.

It is a super-2 number, since 2×64777487519² (a number of 22 digits) contains 22 as substring.

Together with 64777487521, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64777487419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32388743759 + 32388743760.

It is an arithmetic number, because the mean of its divisors is an integer number (32388743760).

Almost surely, 2^64777487519 is an apocalyptic number.

64777487519 is a deficient number, since it is larger than the sum of its proper divisors (1).

64777487519 is an equidigital number, since it uses as much as digits as its factorization.

64777487519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82978560, while the sum is 65.

The spelling of 64777487519 in words is "sixty-four billion, seven hundred seventy-seven million, four hundred eighty-seven thousand, five hundred nineteen".