162756789091 has 4 divisors (see below), whose sum is σ = 175276542112. Its totient is φ = 150237036072.

The previous prime is 162756789077. The next prime is 162756789113. The reversal of 162756789091 is 190987657261.

162756789091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190987657261 = 61 ⋅3130945201.

It is a cyclic number.

It is not a de Polignac number, because 162756789091 - 2²³ = 162748400483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (162756789491) 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 3 ways as a sum of consecutive naturals, for example, 6259876491 + ... + 6259876516.

It is an arithmetic number, because the mean of its divisors is an integer number (43819135528).

Almost surely, 2^162756789091 is an apocalyptic number.

162756789091 is a deficient number, since it is larger than the sum of its proper divisors (12519753021).

162756789091 is a wasteful number, since it uses less digits than its factorization.

162756789091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12519753020.

The product of its (nonzero) digits is 11430720, while the sum is 61.

The spelling of 162756789091 in words is "one hundred sixty-two billion, seven hundred fifty-six million, seven hundred eighty-nine thousand, ninety-one".