16765778055 has 32 divisors (see below), whose sum is σ = 29433813696. Its totient is φ = 8098182144.

The previous prime is 16765778053. The next prime is 16765778077. The reversal of 16765778055 is 55087756761.

It is not a de Polignac number, because 16765778055 - 2¹ = 16765778053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16765777986 and 16765778004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16765778053) 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, 800782 + ... + 821451.

It is an arithmetic number, because the mean of its divisors is an integer number (919806678).

Almost surely, 2^16765778055 is an apocalyptic number.

16765778055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16765778055 is a deficient number, since it is larger than the sum of its proper divisors (12668035641).

16765778055 is a wasteful number, since it uses less digits than its factorization.

16765778055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622307.

The product of its (nonzero) digits is 12348000, while the sum is 57.

The spelling of 16765778055 in words is "sixteen billion, seven hundred sixty-five million, seven hundred seventy-eight thousand, fifty-five".