1109661617 has 16 divisors (see below), whose sum is σ = 1179024000. Its totient is φ = 1041444864.

The previous prime is 1109661601. The next prime is 1109661629. The reversal of 1109661617 is 7161669011.

It is a cyclic number.

It is not a de Polignac number, because 1109661617 - 2⁴ = 1109661601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1109661697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1442609 + ... + 1443377.

It is an arithmetic number, because the mean of its divisors is an integer number (73689000).

Almost surely, 2^1109661617 is an apocalyptic number.

It is an amenable number.

1109661617 is a deficient number, since it is larger than the sum of its proper divisors (69362383).

1109661617 is a wasteful number, since it uses less digits than its factorization.

1109661617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 1109661617 is about 33311.5838260507. The cubic root of 1109661617 is about 1035.2935811353.

The spelling of 1109661617 in words is "one billion, one hundred nine million, six hundred sixty-one thousand, six hundred seventeen".