2191096147969 has 8 divisors (see below), whose sum is σ = 2211717309480. Its totient is φ = 2170566433536.

The previous prime is 2191096147939. The next prime is 2191096147991. The reversal of 2191096147969 is 9697416901912.

It can be written as a sum of positive squares in 4 ways, for example, as 155015438400 + 2036080709569 = 393720^2 + 1426913^2 .

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 2191096147969 - 2¹⁷ = 2191096016897 is a prime.

It is a super-2 number, since 2×2191096147969² (a number of 25 digits) contains 22 as substring.

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 2191096147969.

It is not an unprimeable number, because it can be changed into a prime (2191096147939) 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 7 ways as a sum of consecutive naturals, for example, 22813624 + ... + 22909465.

It is an arithmetic number, because the mean of its divisors is an integer number (276464663685).

Almost surely, 2^{2191096147969} is an apocalyptic number.

It is an amenable number.

2191096147969 is a deficient number, since it is larger than the sum of its proper divisors (20621161511).

2191096147969 is a wasteful number, since it uses less digits than its factorization.

2191096147969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45723539.

The product of its (nonzero) digits is 13226976, while the sum is 64.

The spelling of 2191096147969 in words is "two trillion, one hundred ninety-one billion, ninety-six million, one hundred forty-seven thousand, nine hundred sixty-nine".