1115601615 has 24 divisors (see below), whose sum is σ = 1985974848. Its totient is φ = 578905920.

The previous prime is 1115601607. The next prime is 1115601623. The reversal of 1115601615 is 5161065111.

It is an interprime number because it is at equal distance from previous prime (1115601607) and next prime (1115601623).

It is not a de Polignac number, because 1115601615 - 2³ = 1115601607 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333351 + ... + 336680.

It is an arithmetic number, because the mean of its divisors is an integer number (82748952).

Almost surely, 2^1115601615 is an apocalyptic number.

1115601615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1115601615 is a deficient number, since it is larger than the sum of its proper divisors (870373233).

1115601615 is a wasteful number, since it uses less digits than its factorization.

1115601615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670079 (or 670076 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The square root of 1115601615 is about 33400.6229732321. The cubic root of 1115601615 is about 1037.1375971401.

Adding to 1115601615 its reverse (5161065111), we get a palindrome (6276666726).

The spelling of 1115601615 in words is "one billion, one hundred fifteen million, six hundred one thousand, six hundred fifteen".