1272429808836 has 24 divisors (see below), whose sum is σ = 2970396190944. Its totient is φ = 423944226240.

The previous prime is 1272429808823. The next prime is 1272429808889. The reversal of 1272429808836 is 6388089242721.

It is a self number, because there is not a number n which added to its sum of digits gives 1272429808836.

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, 24853785 + ... + 24904928.

It is an arithmetic number, because the mean of its divisors is an integer number (123766507956).

Almost surely, 2^{1272429808836} is an apocalyptic number.

It is an amenable number.

1272429808836 is an abundant number, since it is smaller than the sum of its proper divisors (1697966382108).

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

1272429808836 is a wasteful number, since it uses less digits than its factorization.

1272429808836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49760851 (or 49760849 counting only the distinct ones).

The product of its (nonzero) digits is 18579456, while the sum is 60.

The spelling of 1272429808836 in words is "one trillion, two hundred seventy-two billion, four hundred twenty-nine million, eight hundred eight thousand, eight hundred thirty-six".