64845877757 has 2 divisors, whose sum is σ = 64845877758. Its totient is φ = 64845877756.

The previous prime is 64845877741. The next prime is 64845877763. The reversal of 64845877757 is 75777854846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61577926201 + 3267951556 = 248149^2 + 57166^2 .

It is a cyclic number.

It is not a de Polignac number, because 64845877757 - 2⁴ = 64845877741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64865877757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32422938878 + 32422938879.

It is an arithmetic number, because the mean of its divisors is an integer number (32422938879).

Almost surely, 2^64845877757 is an apocalyptic number.

It is an amenable number.

64845877757 is a deficient number, since it is larger than the sum of its proper divisors (1).

64845877757 is an equidigital number, since it uses as much as digits as its factorization.

64845877757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 368793600, while the sum is 68.

The spelling of 64845877757 in words is "sixty-four billion, eight hundred forty-five million, eight hundred seventy-seven thousand, seven hundred fifty-seven".