1227639790572 has 48 divisors (see below), whose sum is σ = 3086352165120. Its totient is φ = 377549967168.

The previous prime is 1227639790561. The next prime is 1227639790589. The reversal of 1227639790572 is 2750979367221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1611658 + ... + 2247825.

It is an arithmetic number, because the mean of its divisors is an integer number (64299003440).

Almost surely, 2^{1227639790572} is an apocalyptic number.

1227639790572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1227639790572 is an abundant number, since it is smaller than the sum of its proper divisors (1858712374548).

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

1227639790572 is a wasteful number, since it uses less digits than its factorization.

1227639790572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861542 (or 3861540 counting only the distinct ones).

The product of its (nonzero) digits is 20003760, while the sum is 60.

The spelling of 1227639790572 in words is "one trillion, two hundred twenty-seven billion, six hundred thirty-nine million, seven hundred ninety thousand, five hundred seventy-two".