478746826139 has 4 divisors (see below), whose sum is σ = 485892301224. Its totient is φ = 471601351056.

The previous prime is 478746826127. The next prime is 478746826147. The reversal of 478746826139 is 931628647874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931628647874 = 2 ⋅465814323937.

It is a cyclic number.

It is not a de Polignac number, because 478746826139 - 2¹⁶ = 478746760603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478746826339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3572737442 + ... + 3572737575.

It is an arithmetic number, because the mean of its divisors is an integer number (121473075306).

Almost surely, 2^478746826139 is an apocalyptic number.

478746826139 is a deficient number, since it is larger than the sum of its proper divisors (7145475085).

478746826139 is an equidigital number, since it uses as much as digits as its factorization.

478746826139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7145475084.

The product of its digits is 97542144, while the sum is 65.

The spelling of 478746826139 in words is "four hundred seventy-eight billion, seven hundred forty-six million, eight hundred twenty-six thousand, one hundred thirty-nine".