1561822848 has 48 divisors (see below), whose sum is σ = 4494311250. Its totient is φ = 520607232.

The previous prime is 1561822817. The next prime is 1561822883. The reversal of 1561822848 is 8482281651.

1561822848 is a `hidden beast` number, since 1 + 5 + 618 + 2 + 28 + 4 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1425213504 + 136609344 = 37752^2 + 11688^2 .

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1561822848² = 4878581217069662208, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 676723 + ... + 679026.

Almost surely, 2^1561822848 is an apocalyptic number.

1561822848 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1561822848 is an abundant number, since it is smaller than the sum of its proper divisors (2932488402).

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

1561822848 is a wasteful number, since it uses less digits than its factorization.

1561822848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355769 (or 1355754 counting only the distinct ones).

The product of its digits is 245760, while the sum is 45.

The square root of 1561822848 is about 39519.9044533258. The cubic root of 1561822848 is about 1160.2295542531.

The spelling of 1561822848 in words is "one billion, five hundred sixty-one million, eight hundred twenty-two thousand, eight hundred forty-eight".