1561303612 has 12 divisors (see below), whose sum is σ = 2980670616. Its totient is φ = 709683440.

The previous prime is 1561303577. The next prime is 1561303673. The reversal of 1561303612 is 2163031651.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17742043 + ... + 17742130.

It is an arithmetic number, because the mean of its divisors is an integer number (248389218).

Almost surely, 2^1561303612 is an apocalyptic number.

It is an amenable number.

1561303612 is a deficient number, since it is larger than the sum of its proper divisors (1419367004).

1561303612 is a wasteful number, since it uses less digits than its factorization.

1561303612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35484188 (or 35484186 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1561303612 is about 39513.3346099769. The cubic root of 1561303612 is about 1160.1009652507.

The spelling of 1561303612 in words is "one billion, five hundred sixty-one million, three hundred three thousand, six hundred twelve".