478896908391 has 20 divisors (see below), whose sum is σ = 780424592904. Its totient is φ = 290240550000.

The previous prime is 478896908363. The next prime is 478896908393. The reversal of 478896908391 is 193809698874.

478896908391 is a `hidden beast` number, since 4 + 78 + 89 + 6 + 90 + 8 + 391 = 666.

It is not a de Polignac number, because 478896908391 - 2⁷ = 478896908263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478896908393) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 268740360 + ... + 268742141.

Almost surely, 2^478896908391 is an apocalyptic number.

478896908391 is a deficient number, since it is larger than the sum of its proper divisors (301527684513).

478896908391 is a wasteful number, since it uses less digits than its factorization.

478896908391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537482524 (or 537482515 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 72.

The spelling of 478896908391 in words is "four hundred seventy-eight billion, eight hundred ninety-six million, nine hundred eight thousand, three hundred ninety-one".