11781380611 has 48 divisors (see below), whose sum is σ = 16186963968. Its totient is φ = 8428795200.

The previous prime is 11781380599. The next prime is 11781380621. The reversal of 11781380611 is 11608318711.

11781380611 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11781380611 - 2¹⁹ = 11780856323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11781380621) 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 47 ways as a sum of consecutive naturals, for example, 1333936 + ... + 1342738.

It is an arithmetic number, because the mean of its divisors is an integer number (337228416).

Almost surely, 2^11781380611 is an apocalyptic number.

11781380611 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11781380611 is a deficient number, since it is larger than the sum of its proper divisors (4405583357).

11781380611 is a wasteful number, since it uses less digits than its factorization.

11781380611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9032 (or 9025 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 37.

The spelling of 11781380611 in words is "eleven billion, seven hundred eighty-one million, three hundred eighty thousand, six hundred eleven".