1163261515 has 64 divisors (see below), whose sum is σ = 1616412672. Its totient is φ = 797529600.

The previous prime is 1163261509. The next prime is 1163261563. The reversal of 1163261515 is 5151623611.

It is a happy number.

It is not a de Polignac number, because 1163261515 - 2³ = 1163261507 is a prime.

It is a super-3 number, since 3×1163261515³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 6723969 + ... + 6724141.

It is an arithmetic number, because the mean of its divisors is an integer number (25256448).

Almost surely, 2^1163261515 is an apocalyptic number.

1163261515 is a deficient number, since it is larger than the sum of its proper divisors (453151157).

1163261515 is a wasteful number, since it uses less digits than its factorization.

1163261515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its digits is 5400, while the sum is 31.

The square root of 1163261515 is about 34106.6198119954. The cubic root of 1163261515 is about 1051.7014033375.

The spelling of 1163261515 in words is "one billion, one hundred sixty-three million, two hundred sixty-one thousand, five hundred fifteen".