1909181911011 has 8 divisors (see below), whose sum is σ = 2546347047504. Its totient is φ = 1272402357600.

The previous prime is 1909181910931. The next prime is 1909181911031. The reversal of 1909181911011 is 1101191819091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1909181911011 - 2¹⁵ = 1909181878243 is a prime.

It is a super-2 number, since 2×1909181911011² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1909181911031) 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, 96384216 + ... + 96404021.

It is an arithmetic number, because the mean of its divisors is an integer number (318293380938).

Almost surely, 2^{1909181911011} is an apocalyptic number.

1909181911011 is a deficient number, since it is larger than the sum of its proper divisors (637165136493).

1909181911011 is a wasteful number, since it uses less digits than its factorization.

1909181911011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192791541.

The product of its (nonzero) digits is 5832, while the sum is 42.

The spelling of 1909181911011 in words is "one trillion, nine hundred nine billion, one hundred eighty-one million, nine hundred eleven thousand, eleven".