16779092761 has 4 divisors (see below), whose sum is σ = 16779813732. Its totient is φ = 16778371792.

The previous prime is 16779092753. The next prime is 16779092783. The reversal of 16779092761 is 16729097761.

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 8682512400 + 8096580361 = 93180^2 + 89981^2 .

It is a cyclic number.

It is not a de Polignac number, because 16779092761 - 2³ = 16779092753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16779092711) 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, 324370 + ... + 372523.

It is an arithmetic number, because the mean of its divisors is an integer number (4194953433).

Almost surely, 2^16779092761 is an apocalyptic number.

It is an amenable number.

16779092761 is a deficient number, since it is larger than the sum of its proper divisors (720971).

16779092761 is an equidigital number, since it uses as much as digits as its factorization.

16779092761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720970.

The product of its (nonzero) digits is 2000376, while the sum is 55.

Subtracting from 16779092761 its reverse (16729097761), we obtain a triangular number (49995000 = T₉₉₉₉).

The spelling of 16779092761 in words is "sixteen billion, seven hundred seventy-nine million, ninety-two thousand, seven hundred sixty-one".