1626016802161 has 2 divisors, whose sum is σ = 1626016802162. Its totient is φ = 1626016802160.

The previous prime is 1626016802153. The next prime is 1626016802233. The reversal of 1626016802161 is 1612086106261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1204758688225 + 421258113936 = 1097615^2 + 649044^2 .

It is an emirp because it is prime and its reverse (1612086106261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1626016802161 - 2³ = 1626016802153 is a prime.

It is a super-2 number, since 2×1626016802161² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1626016802141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 813008401080 + 813008401081.

It is an arithmetic number, because the mean of its divisors is an integer number (813008401081).

Almost surely, 2^{1626016802161} is an apocalyptic number.

It is an amenable number.

1626016802161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1626016802161 is an equidigital number, since it uses as much as digits as its factorization.

1626016802161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 1626016802161 in words is "one trillion, six hundred twenty-six billion, sixteen million, eight hundred two thousand, one hundred sixty-one".