1217957911232 has 56 divisors (see below), whose sum is σ = 2434074948960. Its totient is φ = 604651622400.

The previous prime is 1217957911231. The next prime is 1217957911399. The reversal of 1217957911232 is 2321197597121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1217957911231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20545058 + ... + 20604254.

Almost surely, 2^{1217957911232} is an apocalyptic number.

It is an amenable number.

1217957911232 is a deficient number, since it is larger than the sum of its proper divisors (1216117037728).

1217957911232 is a wasteful number, since it uses less digits than its factorization.

1217957911232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61489 (or 61479 counting only the distinct ones).

The product of its digits is 476280, while the sum is 50.

The spelling of 1217957911232 in words is "one trillion, two hundred seventeen billion, nine hundred fifty-seven million, nine hundred eleven thousand, two hundred thirty-two".