1272528813660 has 48 divisors (see below), whose sum is σ = 3837163809696. Its totient is φ = 313237861632.

The previous prime is 1272528813659. The next prime is 1272528813679. The reversal of 1272528813660 is 663188252721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 815722819 + ... + 815724378.

It is an arithmetic number, because the mean of its divisors is an integer number (79940912702).

Almost surely, 2^{1272528813660} is an apocalyptic number.

1272528813660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272528813660 is an abundant number, since it is smaller than the sum of its proper divisors (2564634996036).

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

1272528813660 is a wasteful number, since it uses less digits than its factorization.

1272528813660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631447222 (or 1631447220 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 1272528813660 in words is "one trillion, two hundred seventy-two billion, five hundred twenty-eight million, eight hundred thirteen thousand, six hundred sixty".