16355704771657 has 4 divisors (see below), whose sum is σ = 16754624400276. Its totient is φ = 15956785143040.

The previous prime is 16355704771649. The next prime is 16355704771673. The reversal of 16355704771657 is 75617740755361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7396572272896 + 8959132498761 = 2719664^2 + 2993181^2 .

It is a cyclic number.

It is not a de Polignac number, because 16355704771657 - 2³ = 16355704771649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16355704771607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199459814248 + ... + 199459814329.

It is an arithmetic number, because the mean of its divisors is an integer number (4188656100069).

Almost surely, 2^{16355704771657} is an apocalyptic number.

It is an amenable number.

16355704771657 is a deficient number, since it is larger than the sum of its proper divisors (398919628619).

16355704771657 is an equidigital number, since it uses as much as digits as its factorization.

16355704771657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398919628618.

The product of its (nonzero) digits is 129654000, while the sum is 64.

The spelling of 16355704771657 in words is "sixteen trillion, three hundred fifty-five billion, seven hundred four million, seven hundred seventy-one thousand, six hundred fifty-seven".