12477727858 has 4 divisors (see below), whose sum is σ = 18716591790. Its totient is φ = 6238863928.

The previous prime is 12477727841. The next prime is 12477727859. The reversal of 12477727858 is 85872777421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85872777421 = 607 ⋅141470803.

It can be written as a sum of positive squares in only one way, i.e., 12468625569 + 9102289 = 111663^2 + 3017^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12477727859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3119431963 + ... + 3119431966.

Almost surely, 2^12477727858 is an apocalyptic number.

12477727858 is a deficient number, since it is larger than the sum of its proper divisors (6238863932).

12477727858 is an equidigital number, since it uses as much as digits as its factorization.

12477727858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6238863931.

The product of its digits is 12293120, while the sum is 58.

The spelling of 12477727858 in words is "twelve billion, four hundred seventy-seven million, seven hundred twenty-seven thousand, eight hundred fifty-eight".