1217407832540 has 36 divisors (see below), whose sum is σ = 2600622493896. Its totient is φ = 478709493216.

The previous prime is 1217407832533. The next prime is 1217407832579. The reversal of 1217407832540 is 452387047121.

It is a junction number, because it is equal to n+sod(n) for n = 1217407832491 and 1217407832500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8673614 + ... + 8812853.

Almost surely, 2^{1217407832540} is an apocalyptic number.

1217407832540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1217407832540 is an abundant number, since it is smaller than the sum of its proper divisors (1383214661356).

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

1217407832540 is a wasteful number, since it uses less digits than its factorization.

1217407832540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17486594 (or 17486533 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 44.

The spelling of 1217407832540 in words is "one trillion, two hundred seventeen billion, four hundred seven million, eight hundred thirty-two thousand, five hundred forty".