64408348973 has 2 divisors, whose sum is σ = 64408348974. Its totient is φ = 64408348972.

The previous prime is 64408348933. The next prime is 64408348997. The reversal of 64408348973 is 37984380446.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64159876804 + 248472169 = 253298^2 + 15763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64408348973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64408348933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32204174486 + 32204174487.

It is an arithmetic number, because the mean of its divisors is an integer number (32204174487).

Almost surely, 2^64408348973 is an apocalyptic number.

It is an amenable number.

64408348973 is a deficient number, since it is larger than the sum of its proper divisors (1).

64408348973 is an equidigital number, since it uses as much as digits as its factorization.

64408348973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13934592, while the sum is 56.

The spelling of 64408348973 in words is "sixty-four billion, four hundred eight million, three hundred forty-eight thousand, nine hundred seventy-three".