161606050515031 has 2 divisors, whose sum is σ = 161606050515032. Its totient is φ = 161606050515030.

The previous prime is 161606050515023. The next prime is 161606050515059. The reversal of 161606050515031 is 130515050606161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161606050515031 - 2³ = 161606050515023 is a prime.

It is a super-2 number, since 2×161606050515031² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161606050515001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80803025257515 + 80803025257516.

It is an arithmetic number, because the mean of its divisors is an integer number (80803025257516).

Almost surely, 2^{161606050515031} is an apocalyptic number.

161606050515031 is a deficient number, since it is larger than the sum of its proper divisors (1).

161606050515031 is an equidigital number, since it uses as much as digits as its factorization.

161606050515031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 40.

The spelling of 161606050515031 in words is "one hundred sixty-one trillion, six hundred six billion, fifty million, five hundred fifteen thousand, thirty-one".