1115377561 has 8 divisors (see below), whose sum is σ = 1125776960. Its totient is φ = 1105012368.

The previous prime is 1115377517. The next prime is 1115377583. The reversal of 1115377561 is 1657735111.

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 1115377561 - 2⁹ = 1115377049 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 1115377561.

It is not an unprimeable number, because it can be changed into a prime (1115377511) 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, 59455 + ... + 75931.

It is an arithmetic number, because the mean of its divisors is an integer number (140722120).

Almost surely, 2^1115377561 is an apocalyptic number.

It is an amenable number.

1115377561 is a deficient number, since it is larger than the sum of its proper divisors (10399399).

1115377561 is a wasteful number, since it uses less digits than its factorization.

1115377561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17103.

The product of its digits is 22050, while the sum is 37.

The square root of 1115377561 is about 33397.2687655742. The cubic root of 1115377561 is about 1037.0681606488.

The spelling of 1115377561 in words is "one billion, one hundred fifteen million, three hundred seventy-seven thousand, five hundred sixty-one".