64257658877 has 2 divisors, whose sum is σ = 64257658878. Its totient is φ = 64257658876.

The previous prime is 64257658847. The next prime is 64257658901. The reversal of 64257658877 is 77885675246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61011964036 + 3245694841 = 247006^2 + 56971^2 .

It is a cyclic number.

It is not a de Polignac number, because 64257658877 - 2¹⁶ = 64257593341 is a prime.

It is a super-2 number, since 2×64257658877² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64257658847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32128829438 + 32128829439.

It is an arithmetic number, because the mean of its divisors is an integer number (32128829439).

Almost surely, 2^64257658877 is an apocalyptic number.

It is an amenable number.

64257658877 is a deficient number, since it is larger than the sum of its proper divisors (1).

64257658877 is an equidigital number, since it uses as much as digits as its factorization.

64257658877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158054400, while the sum is 65.

The spelling of 64257658877 in words is "sixty-four billion, two hundred fifty-seven million, six hundred fifty-eight thousand, eight hundred seventy-seven".