161554411 has 2 divisors, whose sum is σ = 161554412. Its totient is φ = 161554410.

The previous prime is 161554399. The next prime is 161554427. The reversal of 161554411 is 114455161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161554411 - 2¹³ = 161546219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161554411.

It is not a weakly prime, because it can be changed into another prime (161524411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80777205 + 80777206.

It is an arithmetic number, because the mean of its divisors is an integer number (80777206).

Almost surely, 2^161554411 is an apocalyptic number.

161554411 is a deficient number, since it is larger than the sum of its proper divisors (1).

161554411 is an equidigital number, since it uses as much as digits as its factorization.

161554411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 28.

The square root of 161554411 is about 12710.4056190194. The cubic root of 161554411 is about 544.6359109068.

The spelling of 161554411 in words is "one hundred sixty-one million, five hundred fifty-four thousand, four hundred eleven".