161227212016 has 40 divisors (see below), whose sum is σ = 356195420784. Its totient is φ = 70035348480.

The previous prime is 161227212001. The next prime is 161227212043. The reversal of 161227212016 is 610212722161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22794430 + ... + 22801501.

Almost surely, 2^161227212016 is an apocalyptic number.

161227212016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161227212016 is an abundant number, since it is smaller than the sum of its proper divisors (194968208768).

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

161227212016 is a wasteful number, since it uses less digits than its factorization.

161227212016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45595969 (or 45595963 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

Adding to 161227212016 its reverse (610212722161), we get a palindrome (771439934177).

The spelling of 161227212016 in words is "one hundred sixty-one billion, two hundred twenty-seven million, two hundred twelve thousand, sixteen".