1561340204 has 6 divisors (see below), whose sum is σ = 2732345364. Its totient is φ = 780670100.

The previous prime is 1561340177. The next prime is 1561340233. The reversal of 1561340204 is 4020431651.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195167522 + ... + 195167529.

It is an arithmetic number, because the mean of its divisors is an integer number (455390894).

Almost surely, 2^1561340204 is an apocalyptic number.

It is an amenable number.

1561340204 is a deficient number, since it is larger than the sum of its proper divisors (1171005160).

1561340204 is a wasteful number, since it uses less digits than its factorization.

1561340204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390335055 (or 390335053 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1561340204 is about 39513.7976408241. The cubic root of 1561340204 is about 1160.1100282078.

Adding to 1561340204 its reverse (4020431651), we get a palindrome (5581771855).

The spelling of 1561340204 in words is "one billion, five hundred sixty-one million, three hundred forty thousand, two hundred four".