161650600613 has 2 divisors, whose sum is σ = 161650600614. Its totient is φ = 161650600612.

The previous prime is 161650600583. The next prime is 161650600627. The reversal of 161650600613 is 316006056161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161621688484 + 28912129 = 402022^2 + 5377^2 .

It is a cyclic number.

It is not a de Polignac number, because 161650600613 - 2¹⁶ = 161650535077 is a prime.

It is a super-2 number, since 2×161650600613² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161650600663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80825300306 + 80825300307.

It is an arithmetic number, because the mean of its divisors is an integer number (80825300307).

Almost surely, 2^161650600613 is an apocalyptic number.

It is an amenable number.

161650600613 is a deficient number, since it is larger than the sum of its proper divisors (1).

161650600613 is an equidigital number, since it uses as much as digits as its factorization.

161650600613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

Adding to 161650600613 its reverse (316006056161), we get a palindrome (477656656774).

The spelling of 161650600613 in words is "one hundred sixty-one billion, six hundred fifty million, six hundred thousand, six hundred thirteen".