16442781051 has 32 divisors (see below), whose sum is σ = 23913472000. Its totient is φ = 10014889248.

The previous prime is 16442781049. The next prime is 16442781067. The reversal of 16442781051 is 15018724461.

It is not a de Polignac number, because 16442781051 - 2¹ = 16442781049 is a prime.

It is a super-3 number, since 3×16442781051³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16442781001) 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 31 ways as a sum of consecutive naturals, for example, 151170 + ... + 236088.

It is an arithmetic number, because the mean of its divisors is an integer number (747296000).

Almost surely, 2^16442781051 is an apocalyptic number.

16442781051 is a deficient number, since it is larger than the sum of its proper divisors (7470690949).

16442781051 is a wasteful number, since it uses less digits than its factorization.

16442781051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85063.

The product of its (nonzero) digits is 53760, while the sum is 39.

The spelling of 16442781051 in words is "sixteen billion, four hundred forty-two million, seven hundred eighty-one thousand, fifty-one".