1217332445861 has 32 divisors (see below), whose sum is σ = 1501591645440. Its totient is φ = 963166381056.

The previous prime is 1217332445803. The next prime is 1217332445899. The reversal of 1217332445861 is 1685442337121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1217332445861 is a prime.

It is a super-3 number, since 3×1217332445861³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217332445801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1492451 + ... + 2159183.

It is an arithmetic number, because the mean of its divisors is an integer number (46924738920).

Almost surely, 2^{1217332445861} is an apocalyptic number.

It is an amenable number.

1217332445861 is a deficient number, since it is larger than the sum of its proper divisors (284259199579).

1217332445861 is a wasteful number, since it uses less digits than its factorization.

1217332445861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667053.

The product of its digits is 967680, while the sum is 47.

The spelling of 1217332445861 in words is "one trillion, two hundred seventeen billion, three hundred thirty-two million, four hundred forty-five thousand, eight hundred sixty-one".