1216634264 has 32 divisors (see below), whose sum is σ = 2332149840. Its totient is φ = 594844800.

The previous prime is 1216634261. The next prime is 1216634267. The reversal of 1216634264 is 4624366121.

It is an interprime number because it is at equal distance from previous prime (1216634261) and next prime (1216634267).

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216634261) 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, 77219 + ... + 91629.

Almost surely, 2^1216634264 is an apocalyptic number.

It is an amenable number.

1216634264 is a deficient number, since it is larger than the sum of its proper divisors (1115515576).

1216634264 is a wasteful number, since it uses less digits than its factorization.

1216634264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14651 (or 14647 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 1216634264 is about 34880.2847465441. The cubic root of 1216634264 is about 1067.5462052042.

The spelling of 1216634264 in words is "one billion, two hundred sixteen million, six hundred thirty-four thousand, two hundred sixty-four".