16053256621 has 8 divisors (see below), whose sum is σ = 16998734520. Its totient is φ = 15107908608.

The previous prime is 16053256619. The next prime is 16053256649. The reversal of 16053256621 is 12665235061.

It can be written as a sum of positive squares in 4 ways, for example, as 872552521 + 15180704100 = 29539^2 + 123210^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16053256621 - 2¹ = 16053256619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16053256651) 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 7 ways as a sum of consecutive naturals, for example, 352485 + ... + 395413.

It is an arithmetic number, because the mean of its divisors is an integer number (2124841815).

Almost surely, 2^16053256621 is an apocalyptic number.

It is an amenable number.

16053256621 is a deficient number, since it is larger than the sum of its proper divisors (945477899).

16053256621 is a wasteful number, since it uses less digits than its factorization.

16053256621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64943.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 16053256621 in words is "sixteen billion, fifty-three million, two hundred fifty-six thousand, six hundred twenty-one".