1216854769 has 16 divisors (see below), whose sum is σ = 1343462400. Its totient is φ = 1095145920.

The previous prime is 1216854757. The next prime is 1216854773. The reversal of 1216854769 is 9674586121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1216854769 - 2¹³ = 1216846577 is a prime.

It is a super-2 number, since 2×1216854769² = 2961471057676086722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1216824769) 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, 161907 + ... + 169255.

It is an arithmetic number, because the mean of its divisors is an integer number (83966400).

Almost surely, 2^1216854769 is an apocalyptic number.

It is an amenable number.

1216854769 is a deficient number, since it is larger than the sum of its proper divisors (126607631).

1216854769 is a wasteful number, since it uses less digits than its factorization.

1216854769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7680.

The product of its digits is 725760, while the sum is 49.

The square root of 1216854769 is about 34883.4454863622. The cubic root of 1216854769 is about 1067.6106959782.

The spelling of 1216854769 in words is "one billion, two hundred sixteen million, eight hundred fifty-four thousand, seven hundred sixty-nine".