16081226565 has 64 divisors (see below), whose sum is σ = 27130263552. Its totient is φ = 8125056000.

The previous prime is 16081226563. The next prime is 16081226573. The reversal of 16081226565 is 56562218061.

It is not a de Polignac number, because 16081226565 - 2¹ = 16081226563 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16081226561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3417004 + ... + 3421706.

It is an arithmetic number, because the mean of its divisors is an integer number (423910368).

Almost surely, 2^16081226565 is an apocalyptic number.

16081226565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16081226565 is a deficient number, since it is larger than the sum of its proper divisors (11049036987).

16081226565 is a wasteful number, since it uses less digits than its factorization.

16081226565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4910.

The product of its (nonzero) digits is 172800, while the sum is 42.

The spelling of 16081226565 in words is "sixteen billion, eighty-one million, two hundred twenty-six thousand, five hundred sixty-five".