1121761566 has 24 divisors (see below), whose sum is σ = 2536157520. Its totient is φ = 357662976.

The previous prime is 1121761559. The next prime is 1121761591. The reversal of 1121761566 is 6651671211.

It is a happy number.

1121761566 is a `hidden beast` number, since 1 + 1 + 21 + 76 + 1 + 566 = 666.

1121761566 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 1121761566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1354371 + ... + 1355198.

It is an arithmetic number, because the mean of its divisors is an integer number (105673230).

Almost surely, 2^1121761566 is an apocalyptic number.

1121761566 is an abundant number, since it is smaller than the sum of its proper divisors (1414395954).

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

1121761566 is a wasteful number, since it uses less digits than its factorization.

1121761566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709600 (or 2709597 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 1121761566 is about 33492.7091469173. The cubic root of 1121761566 is about 1039.0429947597.

The spelling of 1121761566 in words is "one billion, one hundred twenty-one million, seven hundred sixty-one thousand, five hundred sixty-six".