16728167377 has 2 divisors, whose sum is σ = 16728167378. Its totient is φ = 16728167376.

The previous prime is 16728167369. The next prime is 16728167381. The reversal of 16728167377 is 77376182761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13910787136 + 2817380241 = 117944^2 + 53079^2 .

It is a cyclic number.

It is not a de Polignac number, because 16728167377 - 2³ = 16728167369 is a prime.

It is a super-5 number, since 5×16728167377⁵ (a number of 52 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (16728167387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8364083688 + 8364083689.

It is an arithmetic number, because the mean of its divisors is an integer number (8364083689).

Almost surely, 2^16728167377 is an apocalyptic number.

It is an amenable number.

16728167377 is a deficient number, since it is larger than the sum of its proper divisors (1).

16728167377 is an equidigital number, since it uses as much as digits as its factorization.

16728167377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4148928, while the sum is 55.

The spelling of 16728167377 in words is "sixteen billion, seven hundred twenty-eight million, one hundred sixty-seven thousand, three hundred seventy-seven".