64841992277 has 2 divisors, whose sum is σ = 64841992278. Its totient is φ = 64841992276.

The previous prime is 64841992253. The next prime is 64841992283. The reversal of 64841992277 is 77229914846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34523869636 + 30318122641 = 185806^2 + 174121^2 .

It is a cyclic number.

It is not a de Polignac number, because 64841992277 - 2⁶ = 64841992213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64841992247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32420996138 + 32420996139.

It is an arithmetic number, because the mean of its divisors is an integer number (32420996139).

Almost surely, 2^64841992277 is an apocalyptic number.

It is an amenable number.

64841992277 is a deficient number, since it is larger than the sum of its proper divisors (1).

64841992277 is an equidigital number, since it uses as much as digits as its factorization.

64841992277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 59.

The spelling of 64841992277 in words is "sixty-four billion, eight hundred forty-one million, nine hundred ninety-two thousand, two hundred seventy-seven".