16468072781 has 4 divisors (see below), whose sum is σ = 16515531552. Its totient is φ = 16420614012.

The previous prime is 16468072693. The next prime is 16468072783. The reversal of 16468072781 is 18727086461.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18727086461 = 1613 ⋅11610097.

It is a cyclic number.

It is not a de Polignac number, because 16468072781 - 2¹⁸ = 16467810637 is a prime.

It is a super-2 number, since 2×16468072781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16468072783) 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 3 ways as a sum of consecutive naturals, for example, 23728865 + ... + 23729558.

It is an arithmetic number, because the mean of its divisors is an integer number (4128882888).

Almost surely, 2^16468072781 is an apocalyptic number.

It is an amenable number.

16468072781 is a deficient number, since it is larger than the sum of its proper divisors (47458771).

16468072781 is an equidigital number, since it uses as much as digits as its factorization.

16468072781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47458770.

The product of its (nonzero) digits is 903168, while the sum is 50.

The spelling of 16468072781 in words is "sixteen billion, four hundred sixty-eight million, seventy-two thousand, seven hundred eighty-one".