478978586251 has 16 divisors (see below), whose sum is σ = 525427918848. Its totient is φ = 433017748800.

The previous prime is 478978586221. The next prime is 478978586323. The reversal of 478978586251 is 152685879874.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 478978586251 - 2¹⁵ = 478978553483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478978586221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2194266 + ... + 2402656.

It is an arithmetic number, because the mean of its divisors is an integer number (32839244928).

Almost surely, 2^478978586251 is an apocalyptic number.

478978586251 is a deficient number, since it is larger than the sum of its proper divisors (46449332597).

478978586251 is a wasteful number, since it uses less digits than its factorization.

478978586251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209562.

The product of its digits is 270950400, while the sum is 70.

The spelling of 478978586251 in words is "four hundred seventy-eight billion, nine hundred seventy-eight million, five hundred eighty-six thousand, two hundred fifty-one".