1216161024 has 144 divisors (see below), whose sum is σ = 3571963584. Its totient is φ = 364953600.

The previous prime is 1216161007. The next prime is 1216161047. The reversal of 1216161024 is 4201616121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1216160985 and 1216161003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407859 + ... + 410829.

Almost surely, 2^1216161024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216161024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785981792).

1216161024 is an abundant number, since it is smaller than the sum of its proper divisors (2355802560).

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

1216161024 is a wasteful number, since it uses less digits than its factorization.

1216161024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044 (or 3030 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1216161024 is about 34873.5003118414. The cubic root of 1216161024 is about 1067.4077710833.

Adding to 1216161024 its reverse (4201616121), we get a palindrome (5417777145).

The spelling of 1216161024 in words is "one billion, two hundred sixteen million, one hundred sixty-one thousand, twenty-four".