161575023403 has 2 divisors, whose sum is σ = 161575023404. Its totient is φ = 161575023402.

The previous prime is 161575023289. The next prime is 161575023509. The reversal of 161575023403 is 304320575161.

It is a strong prime.

It is an emirp because it is prime and its reverse (304320575161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161575023403 - 2⁹ = 161575022891 is a prime.

It is a super-2 number, since 2×161575023403² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161575027403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80787511701 + 80787511702.

It is an arithmetic number, because the mean of its divisors is an integer number (80787511702).

Almost surely, 2^161575023403 is an apocalyptic number.

161575023403 is a deficient number, since it is larger than the sum of its proper divisors (1).

161575023403 is an equidigital number, since it uses as much as digits as its factorization.

161575023403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 37.

Adding to 161575023403 its reverse (304320575161), we get a palindrome (465895598564).

The spelling of 161575023403 in words is "one hundred sixty-one billion, five hundred seventy-five million, twenty-three thousand, four hundred three".