161379316499 has 2 divisors, whose sum is σ = 161379316500. Its totient is φ = 161379316498.

The previous prime is 161379316481. The next prime is 161379316577. The reversal of 161379316499 is 994613973161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161379316499 - 2⁸ = 161379316243 is a prime.

It is not a weakly prime, because it can be changed into another prime (161379316459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80689658249 + 80689658250.

It is an arithmetic number, because the mean of its divisors is an integer number (80689658250).

Almost surely, 2^161379316499 is an apocalyptic number.

161379316499 is a deficient number, since it is larger than the sum of its proper divisors (1).

161379316499 is an equidigital number, since it uses as much as digits as its factorization.

161379316499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6613488, while the sum is 59.

The spelling of 161379316499 in words is "one hundred sixty-one billion, three hundred seventy-nine million, three hundred sixteen thousand, four hundred ninety-nine".