1216287146574 has 24 divisors (see below), whose sum is σ = 2636265317400. Its totient is φ = 405278818128.

The previous prime is 1216287146549. The next prime is 1216287146587. The reversal of 1216287146574 is 4756417826121.

It is a happy number.

1216287146574 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 28 + 7 + 1 + 46 + 574 = 666.

It is a super-2 number, since 2×1216287146574² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1216287146574.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 12469297 + ... + 12566460.

It is an arithmetic number, because the mean of its divisors is an integer number (109844388225).

Almost surely, 2^{1216287146574} is an apocalyptic number.

1216287146574 is an abundant number, since it is smaller than the sum of its proper divisors (1419978170826).

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

1216287146574 is a wasteful number, since it uses less digits than its factorization.

1216287146574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25038464 (or 25038461 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The spelling of 1216287146574 in words is "one trillion, two hundred sixteen billion, two hundred eighty-seven million, one hundred forty-six thousand, five hundred seventy-four".