161841761354775 has 24 divisors (see below), whose sum is σ = 281661451342720. Its totient is φ = 81772679420640.

The previous prime is 161841761354761. The next prime is 161841761354789. The reversal of 161841761354775 is 577453167148161.

It is an interprime number because it is at equal distance from previous prime (161841761354761) and next prime (161841761354789).

It is not a de Polignac number, because 161841761354775 - 2⁹ = 161841761354263 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56786581507 + ... + 56786584356.

Almost surely, 2^{161841761354775} is an apocalyptic number.

161841761354775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161841761354775 is a deficient number, since it is larger than the sum of its proper divisors (119819689987945).

161841761354775 is a wasteful number, since it uses less digits than its factorization.

161841761354775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113573165895 (or 113573165890 counting only the distinct ones).

The product of its digits is 118540800, while the sum is 66.

The spelling of 161841761354775 in words is "one hundred sixty-one trillion, eight hundred forty-one billion, seven hundred sixty-one million, three hundred fifty-four thousand, seven hundred seventy-five".