161353651099 has 2 divisors, whose sum is σ = 161353651100. Its totient is φ = 161353651098.

The previous prime is 161353651073. The next prime is 161353651133. The reversal of 161353651099 is 990156353161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161353651099 - 2³⁷ = 23914697627 is a prime.

It is not a weakly prime, because it can be changed into another prime (161353651049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80676825549 + 80676825550.

It is an arithmetic number, because the mean of its divisors is an integer number (80676825550).

Almost surely, 2^161353651099 is an apocalyptic number.

161353651099 is a deficient number, since it is larger than the sum of its proper divisors (1).

161353651099 is an equidigital number, since it uses as much as digits as its factorization.

161353651099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 656100, while the sum is 49.

The spelling of 161353651099 in words is "one hundred sixty-one billion, three hundred fifty-three million, six hundred fifty-one thousand, ninety-nine".