18091624564997 has 8 divisors (see below), whose sum is σ = 18583220589336. Its totient is φ = 17600167130112.

The previous prime is 18091624564991. The next prime is 18091624565017. The reversal of 18091624564997 is 79946542619081.

It can be written as a sum of positive squares in 4 ways, for example, as 9188985819556 + 8902638745441 = 3031334^2 + 2983729^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18091624564997 is a prime.

It is a super-2 number, since 2×18091624564997² (a number of 27 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 18091624564997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18091624564991) 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, 34382708 + ... + 34904925.

It is an arithmetic number, because the mean of its divisors is an integer number (2322902573667).

Almost surely, 2^{18091624564997} is an apocalyptic number.

It is an amenable number.

18091624564997 is a deficient number, since it is larger than the sum of its proper divisors (491596024339).

18091624564997 is an equidigital number, since it uses as much as digits as its factorization.

18091624564997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69294727.

The product of its (nonzero) digits is 235146240, while the sum is 71.

The spelling of 18091624564997 in words is "eighteen trillion, ninety-one billion, six hundred twenty-four million, five hundred sixty-four thousand, nine hundred ninety-seven".