16586347993 has 12 divisors (see below), whose sum is σ = 18000835740. Its totient is φ = 15229905920.

The previous prime is 16586347979. The next prime is 16586348047. The reversal of 16586347993 is 39974368561.

It can be written as a sum of positive squares in 6 ways, for example, as 143928009 + 16442419984 = 11997^2 + 128228^2 .

It is not a de Polignac number, because 16586347993 - 2¹³ = 16586339801 is a prime.

It is a super-3 number, since 3×16586347993³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16586347693) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 261628 + ... + 318781.

It is an arithmetic number, because the mean of its divisors is an integer number (1500069645).

Almost surely, 2^16586347993 is an apocalyptic number.

It is an amenable number.

16586347993 is a deficient number, since it is larger than the sum of its proper divisors (1414487747).

16586347993 is an equidigital number, since it uses as much as digits as its factorization.

16586347993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580508 (or 580467 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 61.

The spelling of 16586347993 in words is "sixteen billion, five hundred eighty-six million, three hundred forty-seven thousand, nine hundred ninety-three".