16557377101 has 2 divisors, whose sum is σ = 16557377102. Its totient is φ = 16557377100.

The previous prime is 16557377063. The next prime is 16557377107. The reversal of 16557377101 is 10177375561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9900449001 + 6656928100 = 99501^2 + 81590^2 .

It is an emirp because it is prime and its reverse (10177375561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16557377101 - 2⁷ = 16557376973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16557377107) 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 as a sum of consecutive naturals, namely, 8278688550 + 8278688551.

It is an arithmetic number, because the mean of its divisors is an integer number (8278688551).

Almost surely, 2^16557377101 is an apocalyptic number.

It is an amenable number.

16557377101 is a deficient number, since it is larger than the sum of its proper divisors (1).

16557377101 is an equidigital number, since it uses as much as digits as its factorization.

16557377101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 154350, while the sum is 43.

The spelling of 16557377101 in words is "sixteen billion, five hundred fifty-seven million, three hundred seventy-seven thousand, one hundred one".