478878961389 has 8 divisors (see below), whose sum is σ = 642790552800. Its totient is φ = 317110005456.

The previous prime is 478878961349. The next prime is 478878961399. The reversal of 478878961389 is 983169878874.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 478878961389 - 2¹³ = 478878953197 is a prime.

It is a super-2 number, since 2×478878961389² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478878961349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535658347 + ... + 535659240.

It is an arithmetic number, because the mean of its divisors is an integer number (80348819100).

Almost surely, 2^478878961389 is an apocalyptic number.

It is an amenable number.

478878961389 is a deficient number, since it is larger than the sum of its proper divisors (163911591411).

478878961389 is a wasteful number, since it uses less digits than its factorization.

478878961389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071317739.

The product of its digits is 1170505728, while the sum is 78.

The spelling of 478878961389 in words is "four hundred seventy-eight billion, eight hundred seventy-eight million, nine hundred sixty-one thousand, three hundred eighty-nine".