64604008477 has 2 divisors, whose sum is σ = 64604008478. Its totient is φ = 64604008476.

The previous prime is 64604008423. The next prime is 64604008493. The reversal of 64604008477 is 77480040646.

64604008477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36859776121 + 27744232356 = 191989^2 + 166566^2 .

It is a cyclic number.

It is not a de Polignac number, because 64604008477 - 2¹¹ = 64604006429 is a prime.

It is a super-2 number, since 2×64604008477² (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 (64604008177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32302004238 + 32302004239.

It is an arithmetic number, because the mean of its divisors is an integer number (32302004239).

Almost surely, 2^64604008477 is an apocalyptic number.

It is an amenable number.

64604008477 is a deficient number, since it is larger than the sum of its proper divisors (1).

64604008477 is an equidigital number, since it uses as much as digits as its factorization.

64604008477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 64604008477 in words is "sixty-four billion, six hundred four million, eight thousand, four hundred seventy-seven".