161434556198 has 8 divisors (see below), whose sum is σ = 242185520808. Its totient is φ = 80706049264.

The previous prime is 161434556189. The next prime is 161434556207. The reversal of 161434556198 is 891655434161.

It is an interprime number because it is at equal distance from previous prime (161434556189) and next prime (161434556207).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161434556198² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5596436 + ... + 5625207.

It is an arithmetic number, because the mean of its divisors is an integer number (30273190101).

Almost surely, 2^161434556198 is an apocalyptic number.

161434556198 is a deficient number, since it is larger than the sum of its proper divisors (80750964610).

161434556198 is a wasteful number, since it uses less digits than its factorization.

161434556198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11228838.

The product of its digits is 3110400, while the sum is 53.

The spelling of 161434556198 in words is "one hundred sixty-one billion, four hundred thirty-four million, five hundred fifty-six thousand, one hundred ninety-eight".