1561324146 has 32 divisors (see below), whose sum is σ = 3179217600. Its totient is φ = 511075584.

The previous prime is 1561324129. The next prime is 1561324153. The reversal of 1561324146 is 6414231651.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94405 + ... + 109703.

It is an arithmetic number, because the mean of its divisors is an integer number (99350550).

Almost surely, 2^1561324146 is an apocalyptic number.

1561324146 is an abundant number, since it is smaller than the sum of its proper divisors (1617893454).

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

1561324146 is a wasteful number, since it uses less digits than its factorization.

1561324146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15610.

The product of its digits is 17280, while the sum is 33.

The square root of 1561324146 is about 39513.5944454564. The cubic root of 1561324146 is about 1160.1060510453.

Adding to 1561324146 its reverse (6414231651), we get a palindrome (7975555797).

The spelling of 1561324146 in words is "one billion, five hundred sixty-one million, three hundred twenty-four thousand, one hundred forty-six".