478901399138 has 6 divisors (see below), whose sum is σ = 718353566721. Its totient is φ = 239450210232.

The previous prime is 478901399117. The next prime is 478901399189. The reversal of 478901399138 is 831993109874.

It can be written as a sum of positive squares in 2 ways, for example, as 478278746929 + 622652209 = 691577^2 + 24953^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=489337.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 734006 + ... + 1223342.

Almost surely, 2^478901399138 is an apocalyptic number.

478901399138 is a deficient number, since it is larger than the sum of its proper divisors (239452167583).

478901399138 is an frugal number, since it uses more digits than its factorization.

478901399138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978676 (or 489339 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 62.

The spelling of 478901399138 in words is "four hundred seventy-eight billion, nine hundred one million, three hundred ninety-nine thousand, one hundred thirty-eight".