161406510971 has 2 divisors, whose sum is σ = 161406510972. Its totient is φ = 161406510970.

The previous prime is 161406510911. The next prime is 161406510973. The reversal of 161406510971 is 179015604161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161406510971 - 2¹⁸ = 161406248827 is a prime.

Together with 161406510973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161406510973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80703255485 + 80703255486.

It is an arithmetic number, because the mean of its divisors is an integer number (80703255486).

Almost surely, 2^161406510971 is an apocalyptic number.

161406510971 is a deficient number, since it is larger than the sum of its proper divisors (1).

161406510971 is an equidigital number, since it uses as much as digits as its factorization.

161406510971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The spelling of 161406510971 in words is "one hundred sixty-one billion, four hundred six million, five hundred ten thousand, nine hundred seventy-one".