1560661111 has 8 divisors (see below), whose sum is σ = 1571752304. Its totient is φ = 1549601280.

The previous prime is 1560661099. The next prime is 1560661127. The reversal of 1560661111 is 1111660651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1560661111 - 2⁵ = 1560661079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1560661111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1560661171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96940 + ... + 111886.

It is an arithmetic number, because the mean of its divisors is an integer number (196469038).

Almost surely, 2^1560661111 is an apocalyptic number.

1560661111 is a deficient number, since it is larger than the sum of its proper divisors (11091193).

1560661111 is a wasteful number, since it uses less digits than its factorization.

1560661111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15681.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 1560661111 is about 39505.2035939571. The cubic root of 1560661111 is about 1159.9418101508.

The spelling of 1560661111 in words is "one billion, five hundred sixty million, six hundred sixty-one thousand, one hundred eleven".