1561573130 has 16 divisors (see below), whose sum is σ = 3027049704. Its totient is φ = 576580800.

The previous prime is 1561573127. The next prime is 1561573151. The reversal of 1561573130 is 313751651.

It can be written as a sum of positive squares in 4 ways, for example, as 1382575489 + 178997641 = 37183^2 + 13379^2 .

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, 6005921 + ... + 6006180.

Almost surely, 2^1561573130 is an apocalyptic number.

1561573130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1561573130 is a deficient number, since it is larger than the sum of its proper divisors (1465476574).

1561573130 is a wasteful number, since it uses less digits than its factorization.

1561573130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12012121.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 1561573130 is about 39516.7449317375. The cubic root of 1561573130 is about 1160.1677150487.

The spelling of 1561573130 in words is "one billion, five hundred sixty-one million, five hundred seventy-three thousand, one hundred thirty".