74154156161 has 2 divisors, whose sum is σ = 74154156162. Its totient is φ = 74154156160.

The previous prime is 74154156157. The next prime is 74154156163. The reversal of 74154156161 is 16165145147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46984897600 + 27169258561 = 216760^2 + 164831^2 .

It is a cyclic number.

It is not a de Polignac number, because 74154156161 - 2² = 74154156157 is a prime.

It is a Sophie Germain prime.

Together with 74154156163, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (74154156163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37077078080 + 37077078081.

It is an arithmetic number, because the mean of its divisors is an integer number (37077078081).

Almost surely, 2^74154156161 is an apocalyptic number.

It is an amenable number.

74154156161 is a deficient number, since it is larger than the sum of its proper divisors (1).

74154156161 is an equidigital number, since it uses as much as digits as its factorization.

74154156161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The spelling of 74154156161 in words is "seventy-four billion, one hundred fifty-four million, one hundred fifty-six thousand, one hundred sixty-one".