161627403405998 has 8 divisors (see below), whose sum is σ = 242500981906800. Its totient is φ = 80793742770400.

The previous prime is 161627403405953. The next prime is 161627403406033. The reversal of 161627403405998 is 899504304726161.

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

It is a super-2 number, since 2×161627403405998² (a number of 29 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, 9979456178 + ... + 9979472373.

It is an arithmetic number, because the mean of its divisors is an integer number (30312622738350).

It is a 1-persistent number, because it is pandigital, but 2⋅161627403405998 = 323254806811996 is not.

Almost surely, 2^{161627403405998} is an apocalyptic number.

161627403405998 is a deficient number, since it is larger than the sum of its proper divisors (80873578500802).

161627403405998 is a wasteful number, since it uses less digits than its factorization.

161627403405998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19958932602.

The product of its (nonzero) digits is 78382080, while the sum is 65.

The spelling of 161627403405998 in words is "one hundred sixty-one trillion, six hundred twenty-seven billion, four hundred three million, four hundred five thousand, nine hundred ninety-eight".