11781005268 has 24 divisors (see below), whose sum is σ = 28375755520. Its totient is φ = 3800324160.

The previous prime is 11781005263. The next prime is 11781005273. The reversal of 11781005268 is 86250018711.

It is an interprime number because it is at equal distance from previous prime (11781005263) and next prime (11781005273).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11781005261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15834313 + ... + 15835056.

Almost surely, 2^11781005268 is an apocalyptic number.

It is an amenable number.

11781005268 is an abundant number, since it is smaller than the sum of its proper divisors (16594750252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11781005268 is a wasteful number, since it uses less digits than its factorization.

11781005268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31669407 (or 31669405 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 39.

The spelling of 11781005268 in words is "eleven billion, seven hundred eighty-one million, five thousand, two hundred sixty-eight".