211162001491 has 8 divisors (see below), whose sum is σ = 241681342464. Its totient is φ = 180730995720.

The previous prime is 211162001437. The next prime is 211162001513. The reversal of 211162001491 is 194100261112.

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

It is a cyclic number.

It is not a de Polignac number, because 211162001491 - 2⁹ = 211162000979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211162001891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22078675 + ... + 22088236.

It is an arithmetic number, because the mean of its divisors is an integer number (30210167808).

Almost surely, 2^211162001491 is an apocalyptic number.

211162001491 is a deficient number, since it is larger than the sum of its proper divisors (30519340973).

211162001491 is an equidigital number, since it uses as much as digits as its factorization.

211162001491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44167601.

The product of its (nonzero) digits is 864, while the sum is 28.

The spelling of 211162001491 in words is "two hundred eleven billion, one hundred sixty-two million, one thousand, four hundred ninety-one".