161103356416 has 40 divisors (see below), whose sum is σ = 330591882060. Its totient is φ = 78374596608.

The previous prime is 161103356387. The next prime is 161103356431. The reversal of 161103356416 is 614653301161.

It can be written as a sum of positive squares in 2 ways, for example, as 131623840000 + 29479516416 = 362800^2 + 171696^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

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, 4233151 + ... + 4271038.

Almost surely, 2^161103356416 is an apocalyptic number.

161103356416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161103356416 is an abundant number, since it is smaller than the sum of its proper divisors (169488525644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161103356416 is an frugal number, since it uses more digits than its factorization.

161103356416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8504244 (or 8504228 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

Adding to 161103356416 its reverse (614653301161), we get a palindrome (775756657577).

The spelling of 161103356416 in words is "one hundred sixty-one billion, one hundred three million, three hundred fifty-six thousand, four hundred sixteen".