1151878885 has 4 divisors (see below), whose sum is σ = 1382254668. Its totient is φ = 921503104.

The previous prime is 1151878879. The next prime is 1151878907. The reversal of 1151878885 is 5888781511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5888781511 = 19 ⋅309935869.

It can be written as a sum of positive squares in 2 ways, for example, as 117548964 + 1034329921 = 10842^2 + 32161^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151878885 - 2⁹ = 1151878373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115187884 + ... + 115187893.

It is an arithmetic number, because the mean of its divisors is an integer number (345563667).

Almost surely, 2^1151878885 is an apocalyptic number.

It is an amenable number.

1151878885 is a deficient number, since it is larger than the sum of its proper divisors (230375783).

1151878885 is an equidigital number, since it uses as much as digits as its factorization.

1151878885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230375782.

The product of its digits is 716800, while the sum is 52.

The square root of 1151878885 is about 33939.3412576025. The cubic root of 1151878885 is about 1048.2598190009.

The spelling of 1151878885 in words is "one billion, one hundred fifty-one million, eight hundred seventy-eight thousand, eight hundred eighty-five".