161129555087 has 2 divisors, whose sum is σ = 161129555088. Its totient is φ = 161129555086.

The previous prime is 161129555053. The next prime is 161129555161. The reversal of 161129555087 is 780555921161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161129555087 - 2¹⁶ = 161129489551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161129555047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80564777543 + 80564777544.

It is an arithmetic number, because the mean of its divisors is an integer number (80564777544).

Almost surely, 2^161129555087 is an apocalyptic number.

161129555087 is a deficient number, since it is larger than the sum of its proper divisors (1).

161129555087 is an equidigital number, since it uses as much as digits as its factorization.

161129555087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756000, while the sum is 50.

The spelling of 161129555087 in words is "one hundred sixty-one billion, one hundred twenty-nine million, five hundred fifty-five thousand, eighty-seven".