1121619776 has 56 divisors (see below), whose sum is σ = 2364836520. Its totient is φ = 526804992.

The previous prime is 1121619721. The next prime is 1121619791. The reversal of 1121619776 is 6779161211.

It can be written as a sum of positive squares in 4 ways, for example, as 153165376 + 968454400 = 12376^2 + 31120^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60506 + ... + 76838.

Almost surely, 2^1121619776 is an apocalyptic number.

1121619776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121619776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1182418260).

1121619776 is an abundant number, since it is smaller than the sum of its proper divisors (1243216744).

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

1121619776 is a wasteful number, since it uses less digits than its factorization.

1121619776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16411 (or 16401 counting only the distinct ones).

The product of its digits is 31752, while the sum is 41.

The square root of 1121619776 is about 33490.5923506886. The cubic root of 1121619776 is about 1038.9992147746. Note that the first 3 decimals are identical.

The spelling of 1121619776 in words is "one billion, one hundred twenty-one million, six hundred nineteen thousand, seven hundred seventy-six".