1561986052 has 48 divisors (see below), whose sum is σ = 3097725120. Its totient is φ = 682640000.

The previous prime is 1561985983. The next prime is 1561986059. The reversal of 1561986052 is 2506891651.

It is not an unprimeable number, because it can be changed into a prime (1561986059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317838 + ... + 322714.

It is an arithmetic number, because the mean of its divisors is an integer number (64535940).

Almost surely, 2^1561986052 is an apocalyptic number.

It is an amenable number.

1561986052 is a deficient number, since it is larger than the sum of its proper divisors (1535739068).

1561986052 is a wasteful number, since it uses less digits than its factorization.

1561986052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5172 (or 5170 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 1561986052 is about 39521.9692323143. The cubic root of 1561986052 is about 1160.2699659018.

The spelling of 1561986052 in words is "one billion, five hundred sixty-one million, nine hundred eighty-six thousand, fifty-two".