16378196504777 has 2 divisors, whose sum is σ = 16378196504778. Its totient is φ = 16378196504776.

The previous prime is 16378196504743. The next prime is 16378196504819. The reversal of 16378196504777 is 77740569187361.

16378196504777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16325672574016 + 52523930761 = 4040504^2 + 229181^2 .

It is a cyclic number.

It is not a de Polignac number, because 16378196504777 - 2¹⁴ = 16378196488393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16378196504777.

It is not a weakly prime, because it can be changed into another prime (16378196509777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8189098252388 + 8189098252389.

It is an arithmetic number, because the mean of its divisors is an integer number (8189098252389).

Almost surely, 2^{16378196504777} is an apocalyptic number.

It is an amenable number.

16378196504777 is a deficient number, since it is larger than the sum of its proper divisors (1).

16378196504777 is an equidigital number, since it uses as much as digits as its factorization.

16378196504777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373403520, while the sum is 71.

The spelling of 16378196504777 in words is "sixteen trillion, three hundred seventy-eight billion, one hundred ninety-six million, five hundred four thousand, seven hundred seventy-seven".