161800395357 has 8 divisors (see below), whose sum is σ = 215753217120. Its totient is φ = 107857251920.

The previous prime is 161800395349. The next prime is 161800395401. The reversal of 161800395357 is 753593008161.

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

It is a cyclic number.

It is not a de Polignac number, because 161800395357 - 2³ = 161800395349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161800395307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2380482 + ... + 2447507.

It is an arithmetic number, because the mean of its divisors is an integer number (26969152140).

Almost surely, 2^161800395357 is an apocalyptic number.

It is an amenable number.

161800395357 is a deficient number, since it is larger than the sum of its proper divisors (53952821763).

161800395357 is a wasteful number, since it uses less digits than its factorization.

161800395357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4839163.

The product of its (nonzero) digits is 680400, while the sum is 48.

The spelling of 161800395357 in words is "one hundred sixty-one billion, eight hundred million, three hundred ninety-five thousand, three hundred fifty-seven".