1216074735 has 16 divisors (see below), whose sum is σ = 2161910880. Its totient is φ = 648573120.

The previous prime is 1216074709. The next prime is 1216074737. The reversal of 1216074735 is 5374706121.

It is a happy number.

1216074735 is a `hidden beast` number, since 1 + 2 + 1 + 607 + 47 + 3 + 5 = 666.

It is not a de Polignac number, because 1216074735 - 2¹⁴ = 1216058351 is a prime.

It is a super-2 number, since 2×1216074735² = 2957675522210640450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1216074735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216074737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4503846 + ... + 4504115.

It is an arithmetic number, because the mean of its divisors is an integer number (135119430).

Almost surely, 2^1216074735 is an apocalyptic number.

1216074735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1216074735 is a deficient number, since it is larger than the sum of its proper divisors (945836145).

1216074735 is an equidigital number, since it uses as much as digits as its factorization.

1216074735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9007975 (or 9007969 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 1216074735 is about 34872.2631184155. The cubic root of 1216074735 is about 1067.3825255975.

The spelling of 1216074735 in words is "one billion, two hundred sixteen million, seventy-four thousand, seven hundred thirty-five".