478777064391 has 12 divisors (see below), whose sum is σ = 695187642240. Its totient is φ = 317513584320.

The previous prime is 478777064377. The next prime is 478777064411. The reversal of 478777064391 is 193460777874.

478777064391 is a `hidden beast` number, since 47 + 87 + 7 + 70 + 64 + 391 = 666.

It is not a de Polignac number, because 478777064391 - 2⁶ = 478777064327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478777044391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139258626 + ... + 139262063.

It is an arithmetic number, because the mean of its divisors is an integer number (57932303520).

Almost surely, 2^478777064391 is an apocalyptic number.

478777064391 is a deficient number, since it is larger than the sum of its proper divisors (216410577849).

478777064391 is a wasteful number, since it uses less digits than its factorization.

478777064391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278520886 (or 278520883 counting only the distinct ones).

The product of its (nonzero) digits is 49787136, while the sum is 63.

The spelling of 478777064391 in words is "four hundred seventy-eight billion, seven hundred seventy-seven million, sixty-four thousand, three hundred ninety-one".