1115261655 has 16 divisors (see below), whose sum is σ = 1788094464. Its totient is φ = 593580960.

The previous prime is 1115261647. The next prime is 1115261663. The reversal of 1115261655 is 5561625111.

It is an interprime number because it is at equal distance from previous prime (1115261647) and next prime (1115261663).

It is not a de Polignac number, because 1115261655 - 2³ = 1115261647 is a prime.

It is a super-2 number, since 2×1115261655² = 2487617118226678050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69031 + ... + 83640.

It is an arithmetic number, because the mean of its divisors is an integer number (111755904).

Almost surely, 2^1115261655 is an apocalyptic number.

1115261655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1115261655 is a deficient number, since it is larger than the sum of its proper divisors (672832809).

1115261655 is a wasteful number, since it uses less digits than its factorization.

1115261655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153166.

The product of its digits is 9000, while the sum is 33.

The square root of 1115261655 is about 33395.5334588325. The cubic root of 1115261655 is about 1037.0322366143.

Adding to 1115261655 its reverse (5561625111), we get a palindrome (6676886766).

The spelling of 1115261655 in words is "one billion, one hundred fifteen million, two hundred sixty-one thousand, six hundred fifty-five".