16287256091 has 4 divisors (see below), whose sum is σ = 16320428184. Its totient is φ = 16254084000.

The previous prime is 16287256043. The next prime is 16287256099. The reversal of 16287256091 is 19065278261.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16287256091 - 2¹⁰ = 16287255067 is a prime.

It is a super-3 number, since 3×16287256091³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16287256099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16585310 + ... + 16586291.

It is an arithmetic number, because the mean of its divisors is an integer number (4080107046).

Almost surely, 2^16287256091 is an apocalyptic number.

16287256091 is a deficient number, since it is larger than the sum of its proper divisors (33172093).

16287256091 is an equidigital number, since it uses as much as digits as its factorization.

16287256091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33172092.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 16287256091 in words is "sixteen billion, two hundred eighty-seven million, two hundred fifty-six thousand, ninety-one".