191142537771 has 16 divisors (see below), whose sum is σ = 262510688000. Its totient is φ = 123640624800.

The previous prime is 191142537727. The next prime is 191142537799. The reversal of 191142537771 is 177735241191.

191142537771 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 191142537771 - 2¹³ = 191142529579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191142537771.

It is not an unprimeable number, because it can be changed into a prime (191142537071) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4886896 + ... + 4925853.

It is an arithmetic number, because the mean of its divisors is an integer number (16406918000).

Almost surely, 2^191142537771 is an apocalyptic number.

191142537771 is a deficient number, since it is larger than the sum of its proper divisors (71368150229).

191142537771 is a wasteful number, since it uses less digits than its factorization.

191142537771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9812946.

The product of its digits is 370440, while the sum is 48.

The spelling of 191142537771 in words is "one hundred ninety-one billion, one hundred forty-two million, five hundred thirty-seven thousand, seven hundred seventy-one".