16364986641 has 12 divisors (see below), whose sum is σ = 25028803332. Its totient is φ = 10268226816.

The previous prime is 16364986637. The next prime is 16364986643. The reversal of 16364986641 is 14668946361.

It can be written as a sum of positive squares in 2 ways, for example, as 6228524241 + 10136462400 = 78921^2 + 100680^2 .

It is not a de Polignac number, because 16364986641 - 2² = 16364986637 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16364986643) 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 11 ways as a sum of consecutive naturals, for example, 53480196 + ... + 53480501.

It is an arithmetic number, because the mean of its divisors is an integer number (2085733611).

Almost surely, 2^16364986641 is an apocalyptic number.

It is an amenable number.

16364986641 is a deficient number, since it is larger than the sum of its proper divisors (8663816691).

16364986641 is a wasteful number, since it uses less digits than its factorization.

16364986641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106960720 (or 106960717 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The spelling of 16364986641 in words is "sixteen billion, three hundred sixty-four million, nine hundred eighty-six thousand, six hundred forty-one".