1161080787 has 18 divisors (see below), whose sum is σ = 1571511396. Its totient is φ = 762525480.

The previous prime is 1161080777. The next prime is 1161080819. The reversal of 1161080787 is 7870801611.

It is not a de Polignac number, because 1161080787 - 2⁷ = 1161080659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1161080737) 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 17 ways as a sum of consecutive naturals, for example, 6078862 + ... + 6079052.

Almost surely, 2^1161080787 is an apocalyptic number.

1161080787 is a deficient number, since it is larger than the sum of its proper divisors (410430609).

1161080787 is an frugal number, since it uses more digits than its factorization.

1161080787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 39.

The square root of 1161080787 is about 34074.6355373025. The cubic root of 1161080787 is about 1051.0437955884.

The spelling of 1161080787 in words is "one billion, one hundred sixty-one million, eighty thousand, seven hundred eighty-seven".