161373513737 has 2 divisors, whose sum is σ = 161373513738. Its totient is φ = 161373513736.

The previous prime is 161373513703. The next prime is 161373513739. The reversal of 161373513737 is 737315373161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152085180361 + 9288333376 = 389981^2 + 96376^2 .

It is an emirp because it is prime and its reverse (737315373161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161373513737 - 2³⁰ = 160299771913 is a prime.

It is a super-3 number, since 3×161373513737³ (a number of 35 digits) contains 333 as substring.

Together with 161373513739, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 161373513691 and 161373513700.

It is not a weakly prime, because it can be changed into another prime (161373513739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80686756868 + 80686756869.

It is an arithmetic number, because the mean of its divisors is an integer number (80686756869).

Almost surely, 2^161373513737 is an apocalyptic number.

It is an amenable number.

161373513737 is a deficient number, since it is larger than the sum of its proper divisors (1).

161373513737 is an equidigital number, since it uses as much as digits as its factorization.

161373513737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 833490, while the sum is 47.

Adding to 161373513737 its reverse (737315373161), we get a palindrome (898688886898).

The spelling of 161373513737 in words is "one hundred sixty-one billion, three hundred seventy-three million, five hundred thirteen thousand, seven hundred thirty-seven".