16536387 has 8 divisors (see below), whose sum is σ = 25198336. Its totient is φ = 9449352.

The previous prime is 16536383. The next prime is 16536391. The reversal of 16536387 is 78363561.

It is an interprime number because it is at equal distance from previous prime (16536383) and next prime (16536391).

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

It is not a de Polignac number, because 16536387 - 2² = 16536383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16536383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393703 + ... + 393744.

It is an arithmetic number, because the mean of its divisors is an integer number (3149792).

Almost surely, 2^16536387 is an apocalyptic number.

16536387 is a deficient number, since it is larger than the sum of its proper divisors (8661949).

16536387 is an equidigital number, since it uses as much as digits as its factorization.

16536387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787457.

The product of its digits is 90720, while the sum is 39.

The square root of 16536387 is about 4066.4956658037. The cubic root of 16536387 is about 254.7691721233.

The spelling of 16536387 in words is "sixteen million, five hundred thirty-six thousand, three hundred eighty-seven".