12638619042 has 64 divisors (see below), whose sum is σ = 29290339584. Its totient is φ = 3561062400.

The previous prime is 12638619029. The next prime is 12638619047. The reversal of 12638619042 is 24091683621.

12638619042 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 12638618985 and 12638619003.

It is not an unprimeable number, because it can be changed into a prime (12638619047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1084398 + ... + 1095990.

It is an arithmetic number, because the mean of its divisors is an integer number (457661556).

Almost surely, 2^12638619042 is an apocalyptic number.

12638619042 is an abundant number, since it is smaller than the sum of its proper divisors (16651720542).

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

12638619042 is a wasteful number, since it uses less digits than its factorization.

12638619042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11963.

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 12638619042 in words is "twelve billion, six hundred thirty-eight million, six hundred nineteen thousand, forty-two".