1561322882 has 16 divisors (see below), whose sum is σ = 2677065792. Its totient is φ = 669010320.

The previous prime is 1561322881. The next prime is 1561322897. The reversal of 1561322882 is 2882231651.

It is not an unprimeable number, because it can be changed into a prime (1561322881) 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, 121757 + ... + 133967.

It is an arithmetic number, because the mean of its divisors is an integer number (167316612).

Almost surely, 2^1561322882 is an apocalyptic number.

1561322882 is a deficient number, since it is larger than the sum of its proper divisors (1115742910).

1561322882 is a wasteful number, since it uses less digits than its factorization.

1561322882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21353.

The product of its digits is 46080, while the sum is 38.

The square root of 1561322882 is about 39513.5784509578. The cubic root of 1561322882 is about 1160.1057379832.

The spelling of 1561322882 in words is "one billion, five hundred sixty-one million, three hundred twenty-two thousand, eight hundred eighty-two".