11008780871 has 4 divisors (see below), whose sum is σ = 12009579144. Its totient is φ = 10007982600.

The previous prime is 11008780817. The next prime is 11008780873. The reversal of 11008780871 is 17808780011.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-11008780871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11008780873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500399120 + ... + 500399141.

It is an arithmetic number, because the mean of its divisors is an integer number (3002394786).

Almost surely, 2^11008780871 is an apocalyptic number.

11008780871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11008780871 is a deficient number, since it is larger than the sum of its proper divisors (1000798273).

11008780871 is a wasteful number, since it uses less digits than its factorization.

11008780871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000798272.

The product of its (nonzero) digits is 25088, while the sum is 41.

The spelling of 11008780871 in words is "eleven billion, eight million, seven hundred eighty thousand, eight hundred seventy-one".