161349511 has 2 divisors, whose sum is σ = 161349512. Its totient is φ = 161349510.

The previous prime is 161349493. The next prime is 161349541. The reversal of 161349511 is 115943161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161349511 - 2¹¹ = 161347463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161349541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80674755 + 80674756.

It is an arithmetic number, because the mean of its divisors is an integer number (80674756).

Almost surely, 2^161349511 is an apocalyptic number.

161349511 is a deficient number, since it is larger than the sum of its proper divisors (1).

161349511 is an equidigital number, since it uses as much as digits as its factorization.

161349511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 31.

The square root of 161349511 is about 12702.3427366766. The cubic root of 161349511 is about 544.4055589779.

The spelling of 161349511 in words is "one hundred sixty-one million, three hundred forty-nine thousand, five hundred eleven".