191056052011 has 16 divisors (see below), whose sum is σ = 208880695296. Its totient is φ = 173307820000.

The previous prime is 191056052009. The next prime is 191056052093. The reversal of 191056052011 is 110250650191.

It is a cyclic number.

It is not a de Polignac number, because 191056052011 - 2¹ = 191056052009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191056052111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9843126 + ... + 9862516.

It is an arithmetic number, because the mean of its divisors is an integer number (13055043456).

Almost surely, 2^191056052011 is an apocalyptic number.

191056052011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

191056052011 is a deficient number, since it is larger than the sum of its proper divisors (17824643285).

191056052011 is a wasteful number, since it uses less digits than its factorization.

191056052011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21314.

The product of its (nonzero) digits is 2700, while the sum is 31.

The spelling of 191056052011 in words is "one hundred ninety-one billion, fifty-six million, fifty-two thousand, eleven".