64928190917 has 2 divisors, whose sum is σ = 64928190918. Its totient is φ = 64928190916.

The previous prime is 64928190911. The next prime is 64928190923. The reversal of 64928190917 is 71909182946.

It is a balanced prime because it is at equal distance from previous prime (64928190911) and next prime (64928190923).

It can be written as a sum of positive squares in only one way, i.e., 62457007396 + 2471183521 = 249914^2 + 49711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64928190917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64928190911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32464095458 + 32464095459.

It is an arithmetic number, because the mean of its divisors is an integer number (32464095459).

Almost surely, 2^64928190917 is an apocalyptic number.

It is an amenable number.

64928190917 is a deficient number, since it is larger than the sum of its proper divisors (1).

64928190917 is an equidigital number, since it uses as much as digits as its factorization.

64928190917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 56.

The spelling of 64928190917 in words is "sixty-four billion, nine hundred twenty-eight million, one hundred ninety thousand, nine hundred seventeen".