1561552316 has 12 divisors (see below), whose sum is σ = 2876543880. Its totient is φ = 739682640.

The previous prime is 1561552313. The next prime is 1561552319. The reversal of 1561552316 is 6132551651.

It is an interprime number because it is at equal distance from previous prime (1561552313) and next prime (1561552319).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1561552313) by changing a digit.

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, 10273295 + ... + 10273446.

It is an arithmetic number, because the mean of its divisors is an integer number (239711990).

Almost surely, 2^1561552316 is an apocalyptic number.

It is an amenable number.

1561552316 is a deficient number, since it is larger than the sum of its proper divisors (1314991564).

1561552316 is a wasteful number, since it uses less digits than its factorization.

1561552316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20546764 (or 20546762 counting only the distinct ones).

The product of its digits is 27000, while the sum is 35.

The square root of 1561552316 is about 39516.4815741483. The cubic root of 1561552316 is about 1160.1625604522.

The spelling of 1561552316 in words is "one billion, five hundred sixty-one million, five hundred fifty-two thousand, three hundred sixteen".