1161878715 has 16 divisors (see below), whose sum is σ = 2065562400. Its totient is φ = 619668576.

The previous prime is 1161878701. The next prime is 1161878717. The reversal of 1161878715 is 5178781611.

It is a happy number.

1161878715 is a `hidden beast` number, since 11 + 618 + 7 + 8 + 7 + 15 = 666.

It is not a de Polignac number, because 1161878715 - 2¹⁵ = 1161845947 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1161878717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4303120 + ... + 4303389.

It is an arithmetic number, because the mean of its divisors is an integer number (129097650).

Almost surely, 2^1161878715 is an apocalyptic number.

1161878715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161878715 is a deficient number, since it is larger than the sum of its proper divisors (903683685).

1161878715 is an equidigital number, since it uses as much as digits as its factorization.

1161878715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8606523 (or 8606517 counting only the distinct ones).

The product of its digits is 94080, while the sum is 45.

The square root of 1161878715 is about 34086.3420595405. The cubic root of 1161878715 is about 1051.2845095967.

The spelling of 1161878715 in words is "one billion, one hundred sixty-one million, eight hundred seventy-eight thousand, seven hundred fifteen".