16701993155257 has 2 divisors, whose sum is σ = 16701993155258. Its totient is φ = 16701993155256.

The previous prime is 16701993155231. The next prime is 16701993155273. The reversal of 16701993155257 is 75255139910761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13815650397481 + 2886342757776 = 3716941^2 + 1698924^2 .

It is a cyclic number.

It is not a de Polignac number, because 16701993155257 - 2³¹ = 16699845671609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16701993155195 and 16701993155204.

It is not a weakly prime, because it can be changed into another prime (16701993155227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8350996577628 + 8350996577629.

It is an arithmetic number, because the mean of its divisors is an integer number (8350996577629).

Almost surely, 2^{16701993155257} is an apocalyptic number.

It is an amenable number.

16701993155257 is a deficient number, since it is larger than the sum of its proper divisors (1).

16701993155257 is an equidigital number, since it uses as much as digits as its factorization.

16701993155257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17860500, while the sum is 61.

The spelling of 16701993155257 in words is "sixteen trillion, seven hundred one billion, nine hundred ninety-three million, one hundred fifty-five thousand, two hundred fifty-seven".