12469136478 has 16 divisors (see below), whose sum is σ = 25408807056. Its totient is φ = 4077956480.

The previous prime is 12469136461. The next prime is 12469136501. The reversal of 12469136478 is 87463196421.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12469136478.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19605243 + ... + 19605878.

It is an arithmetic number, because the mean of its divisors is an integer number (1588050441).

Almost surely, 2^12469136478 is an apocalyptic number.

12469136478 is an abundant number, since it is smaller than the sum of its proper divisors (12939670578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12469136478 is a wasteful number, since it uses less digits than its factorization.

12469136478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39211179.

The product of its digits is 1741824, while the sum is 51.

The spelling of 12469136478 in words is "twelve billion, four hundred sixty-nine million, one hundred thirty-six thousand, four hundred seventy-eight".