16056658777 has 4 divisors (see below), whose sum is σ = 16754774400. Its totient is φ = 15358543156.

The previous prime is 16056658747. The next prime is 16056658801. The reversal of 16056658777 is 77785665061.

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.

It is a cyclic number.

It is not a de Polignac number, because 16056658777 - 2⁷ = 16056658649 is a prime.

It is a super-2 number, since 2×16056658777² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16056658727) 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, 349057777 + ... + 349057822.

It is an arithmetic number, because the mean of its divisors is an integer number (4188693600).

Almost surely, 2^16056658777 is an apocalyptic number.

It is an amenable number.

16056658777 is a deficient number, since it is larger than the sum of its proper divisors (698115623).

16056658777 is an equidigital number, since it uses as much as digits as its factorization.

16056658777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698115622.

The product of its (nonzero) digits is 14817600, while the sum is 58.

The spelling of 16056658777 in words is "sixteen billion, fifty-six million, six hundred fifty-eight thousand, seven hundred seventy-seven".