1217256793488 has 120 divisors (see below), whose sum is σ = 3555303501568. Its totient is φ = 403167652992.

The previous prime is 1217256793477. The next prime is 1217256793517. The reversal of 1217256793488 is 8843976527121.

1217256793488 is a `hidden beast` number, since 1 + 2 + 1 + 7 + 2 + 5 + 67 + 93 + 488 = 666.

It is a super-2 number, since 2×1217256793488² (a number of 25 digits) contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 386656 + ... + 1607487.

Almost surely, 2^{1217256793488} is an apocalyptic number.

1217256793488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1217256793488 is an abundant number, since it is smaller than the sum of its proper divisors (2338046708080).

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

1217256793488 is a wasteful number, since it uses less digits than its factorization.

1217256793488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1994323 (or 1994305 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The spelling of 1217256793488 in words is "one trillion, two hundred seventeen billion, two hundred fifty-six million, seven hundred ninety-three thousand, four hundred eighty-eight".