161255767 has 2 divisors, whose sum is σ = 161255768. Its totient is φ = 161255766.

The previous prime is 161255687. The next prime is 161255797. The reversal of 161255767 is 767552161.

It is a happy number.

161255767 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161255767 - 2¹⁹ = 160731479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161255797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80627883 + 80627884.

It is an arithmetic number, because the mean of its divisors is an integer number (80627884).

Almost surely, 2^161255767 is an apocalyptic number.

161255767 is a deficient number, since it is larger than the sum of its proper divisors (1).

161255767 is an equidigital number, since it uses as much as digits as its factorization.

161255767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 40.

The square root of 161255767 is about 12698.6521725733. The cubic root of 161255767 is about 544.3001054166.

The spelling of 161255767 in words is "one hundred sixty-one million, two hundred fifty-five thousand, seven hundred sixty-seven".