1115650561 has 8 divisors (see below), whose sum is σ = 1168732800. Its totient is φ = 1063542480.

The previous prime is 1115650553. The next prime is 1115650579. The reversal of 1115650561 is 1650565111.

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 1115650561 - 2³ = 1115650553 is a prime.

It is a super-2 number, since 2×1115650561² = 2489352348519229442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115651561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241195 + ... + 245776.

It is an arithmetic number, because the mean of its divisors is an integer number (146091600).

Almost surely, 2^1115650561 is an apocalyptic number.

It is an amenable number.

1115650561 is a deficient number, since it is larger than the sum of its proper divisors (53082239).

1115650561 is an equidigital number, since it uses as much as digits as its factorization.

1115650561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487079.

The product of its (nonzero) digits is 4500, while the sum is 31.

The square root of 1115650561 is about 33401.3556760800. The cubic root of 1115650561 is about 1037.1527647393.

The spelling of 1115650561 in words is "one billion, one hundred fifteen million, six hundred fifty thousand, five hundred sixty-one".