1561340098 has 16 divisors (see below), whose sum is σ = 2351425536. Its totient is φ = 777538080.

The previous prime is 1561340057. The next prime is 1561340107. The reversal of 1561340098 is 8900431651.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011115 + ... + 1012657.

It is an arithmetic number, because the mean of its divisors is an integer number (146964096).

Almost surely, 2^1561340098 is an apocalyptic number.

1561340098 is a deficient number, since it is larger than the sum of its proper divisors (790085438).

1561340098 is a wasteful number, since it uses less digits than its factorization.

1561340098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3249.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1561340098 is about 39513.7962995205. The cubic root of 1561340098 is about 1160.1100019543.

The spelling of 1561340098 in words is "one billion, five hundred sixty-one million, three hundred forty thousand, ninety-eight".