16617127801 has 2 divisors, whose sum is σ = 16617127802. Its totient is φ = 16617127800.

The previous prime is 16617127799. The next prime is 16617127829. The reversal of 16617127801 is 10872171661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16262370576 + 354757225 = 127524^2 + 18835^2 .

It is a cyclic number.

It is not a de Polignac number, because 16617127801 - 2¹ = 16617127799 is a prime.

It is a super-2 number, since 2×16617127801² (a number of 21 digits) contains 22 as substring.

Together with 16617127799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16617127201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8308563900 + 8308563901.

It is an arithmetic number, because the mean of its divisors is an integer number (8308563901).

Almost surely, 2^16617127801 is an apocalyptic number.

It is an amenable number.

16617127801 is a deficient number, since it is larger than the sum of its proper divisors (1).

16617127801 is an equidigital number, since it uses as much as digits as its factorization.

16617127801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 40.

The spelling of 16617127801 in words is "sixteen billion, six hundred seventeen million, one hundred twenty-seven thousand, eight hundred one".