2011691268 has 24 divisors (see below), whose sum is σ = 5215496160. Its totient is φ = 670563720.

The previous prime is 2011691239. The next prime is 2011691273. The reversal of 2011691268 is 8621961102.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9313278 + ... + 9313493.

It is an arithmetic number, because the mean of its divisors is an integer number (217312340).

Almost surely, 2^2011691268 is an apocalyptic number.

It is an amenable number.

2011691268 is an abundant number, since it is smaller than the sum of its proper divisors (3203804892).

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

2011691268 is a wasteful number, since it uses less digits than its factorization.

2011691268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18626784 (or 18626776 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 2011691268 is about 44851.8814321094. The cubic root of 2011691268 is about 1262.3712941108.

The spelling of 2011691268 in words is "two billion, eleven million, six hundred ninety-one thousand, two hundred sixty-eight".