12457220136 has 16 divisors (see below), whose sum is σ = 31143050400. Its totient is φ = 4152406704.

The previous prime is 12457220119. The next prime is 12457220137. The reversal of 12457220136 is 63102275421.

It is a junction number, because it is equal to n+sod(n) for n = 12457220097 and 12457220106.

It is not an unprimeable number, because it can be changed into a prime (12457220137) 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, 259525396 + ... + 259525443.

It is an arithmetic number, because the mean of its divisors is an integer number (1946440650).

Almost surely, 2^12457220136 is an apocalyptic number.

It is an amenable number.

12457220136 is an abundant number, since it is smaller than the sum of its proper divisors (18685830264).

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

12457220136 is a wasteful number, since it uses less digits than its factorization.

12457220136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519050848 (or 519050844 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

Adding to 12457220136 its reverse (63102275421), we get a palindrome (75559495557).

The spelling of 12457220136 in words is "twelve billion, four hundred fifty-seven million, two hundred twenty thousand, one hundred thirty-six".