12464874778 has 4 divisors (see below), whose sum is σ = 18697312170. Its totient is φ = 6232437388.

The previous prime is 12464874767. The next prime is 12464874781. The reversal of 12464874778 is 87747846421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12461926689 + 2948089 = 111633^2 + 1717^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3116218693 + ... + 3116218696.

Almost surely, 2^12464874778 is an apocalyptic number.

12464874778 is a deficient number, since it is larger than the sum of its proper divisors (6232437392).

12464874778 is an equidigital number, since it uses as much as digits as its factorization.

12464874778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6232437391.

The product of its digits is 16859136, while the sum is 58.

The spelling of 12464874778 in words is "twelve billion, four hundred sixty-four million, eight hundred seventy-four thousand, seven hundred seventy-eight".