1561612712 has 32 divisors (see below), whose sum is σ = 3225852000. Its totient is φ = 702792000.

The previous prime is 1561612711. The next prime is 1561612729. The reversal of 1561612712 is 2172161651.

It is not an unprimeable number, because it can be changed into a prime (1561612711) by changing a digit.

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, 78962 + ... + 96737.

It is an arithmetic number, because the mean of its divisors is an integer number (100807875).

Almost surely, 2^1561612712 is an apocalyptic number.

It is an amenable number.

1561612712 is an abundant number, since it is smaller than the sum of its proper divisors (1664239288).

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

1561612712 is a wasteful number, since it uses less digits than its factorization.

1561612712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175817 (or 175813 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 1561612712 is about 39517.2457542274. The cubic root of 1561612712 is about 1160.1775174225.

The spelling of 1561612712 in words is "one billion, five hundred sixty-one million, six hundred twelve thousand, seven hundred twelve".