16278900481 has 4 divisors (see below), whose sum is σ = 16545767764. Its totient is φ = 16012033200.

The previous prime is 16278900479. The next prime is 16278900529. The reversal of 16278900481 is 18400987261.

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

It can be written as a sum of positive squares in 2 ways, for example, as 574800625 + 15704099856 = 23975^2 + 125316^2 .

It is a cyclic number.

It is not a de Polignac number, because 16278900481 - 2¹ = 16278900479 is a prime.

It is a super-2 number, since 2×16278900481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16278900461) 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, 133433550 + ... + 133433671.

It is an arithmetic number, because the mean of its divisors is an integer number (4136441941).

Almost surely, 2^16278900481 is an apocalyptic number.

It is an amenable number.

16278900481 is a deficient number, since it is larger than the sum of its proper divisors (266867283).

16278900481 is an equidigital number, since it uses as much as digits as its factorization.

16278900481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266867282.

The product of its (nonzero) digits is 193536, while the sum is 46.

The spelling of 16278900481 in words is "sixteen billion, two hundred seventy-eight million, nine hundred thousand, four hundred eighty-one".