1561124616 has 32 divisors (see below), whose sum is σ = 3904122240. Its totient is φ = 520200128.

The previous prime is 1561124597. The next prime is 1561124623. The reversal of 1561124616 is 6164211651.

It is a super-2 number, since 2×1561124616² = 4874220133362294912, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76225 + ... + 94511.

It is an arithmetic number, because the mean of its divisors is an integer number (122003820).

Almost surely, 2^1561124616 is an apocalyptic number.

It is an amenable number.

1561124616 is an abundant number, since it is smaller than the sum of its proper divisors (2342997624).

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

1561124616 is a wasteful number, since it uses less digits than its factorization.

1561124616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21853 (or 21849 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 1561124616 is about 39511.0695375359. The cubic root of 1561124616 is about 1160.0566302119.

The spelling of 1561124616 in words is "one billion, five hundred sixty-one million, one hundred twenty-four thousand, six hundred sixteen".