16778255516 has 24 divisors (see below), whose sum is σ = 32040341760. Its totient is φ = 7624306800.

The previous prime is 16778255497. The next prime is 16778255521. The reversal of 16778255516 is 61555287761.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 107255 + ... + 212273.

It is an arithmetic number, because the mean of its divisors is an integer number (1335014240).

Almost surely, 2^16778255516 is an apocalyptic number.

It is an amenable number.

16778255516 is a deficient number, since it is larger than the sum of its proper divisors (15262086244).

16778255516 is a wasteful number, since it uses less digits than its factorization.

16778255516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108665 (or 108663 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 53.

The spelling of 16778255516 in words is "sixteen billion, seven hundred seventy-eight million, two hundred fifty-five thousand, five hundred sixteen".