12638077770 has 16 divisors (see below), whose sum is σ = 30331386720. Its totient is φ = 3370154064.

The previous prime is 12638077747. The next prime is 12638077801. The reversal of 12638077770 is 7777083621.

It is a happy 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, 210634600 + ... + 210634659.

It is an arithmetic number, because the mean of its divisors is an integer number (1895711670).

Almost surely, 2^12638077770 is an apocalyptic number.

12638077770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12638077770 is an abundant number, since it is smaller than the sum of its proper divisors (17693308950).

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

12638077770 is a wasteful number, since it uses less digits than its factorization.

12638077770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421269269.

The product of its (nonzero) digits is 691488, while the sum is 48.

The spelling of 12638077770 in words is "twelve billion, six hundred thirty-eight million, seventy-seven thousand, seven hundred seventy".