16778090941 has 4 divisors (see below), whose sum is σ = 16783861500. Its totient is φ = 16772320384.

The previous prime is 16778090939. The next prime is 16778090947. The reversal of 16778090941 is 14909087761.

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 8506188441 + 8271902500 = 92229^2 + 90950^2 .

It is a cyclic number.

It is not a de Polignac number, because 16778090941 - 2¹ = 16778090939 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16778090947) 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, 2880916 + ... + 2886733.

It is an arithmetic number, because the mean of its divisors is an integer number (4195965375).

Almost surely, 2^16778090941 is an apocalyptic number.

It is an amenable number.

16778090941 is a deficient number, since it is larger than the sum of its proper divisors (5770559).

16778090941 is an equidigital number, since it uses as much as digits as its factorization.

16778090941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5770558.

The product of its (nonzero) digits is 762048, while the sum is 52.

The spelling of 16778090941 in words is "sixteen billion, seven hundred seventy-eight million, ninety thousand, nine hundred forty-one".