1217725670056 has 64 divisors (see below), whose sum is σ = 2771106249600. Its totient is φ = 489725816832.

The previous prime is 1217725670017. The next prime is 1217725670069. The reversal of 1217725670056 is 6500765277121.

It is a junction number, because it is equal to n+sod(n) for n = 1217725669991 and 1217725670009.

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, 1576986 + ... + 2218633.

It is an arithmetic number, because the mean of its divisors is an integer number (43298535150).

Almost surely, 2^{1217725670056} is an apocalyptic number.

It is an amenable number.

1217725670056 is an abundant number, since it is smaller than the sum of its proper divisors (1553380579544).

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

1217725670056 is a wasteful number, since it uses less digits than its factorization.

1217725670056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3795986 (or 3795982 counting only the distinct ones).

The product of its (nonzero) digits is 1234800, while the sum is 49.

The spelling of 1217725670056 in words is "one trillion, two hundred seventeen billion, seven hundred twenty-five million, six hundred seventy thousand, fifty-six".