161226648 has 48 divisors (see below), whose sum is σ = 476353800. Its totient is φ = 48856320.

The previous prime is 161226641. The next prime is 161226671. The reversal of 161226648 is 846622161.

161226648 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 2 + 6 + 648 = 666.

161226648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161226641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100993 + ... + 102576.

Almost surely, 2^161226648 is an apocalyptic number.

161226648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161226648 is an abundant number, since it is smaller than the sum of its proper divisors (315127152).

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

161226648 is a wasteful number, since it uses less digits than its factorization.

161226648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203592 (or 203585 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 161226648 is about 12697.5055818062. The cubic root of 161226648 is about 544.2673408440.

The spelling of 161226648 in words is "one hundred sixty-one million, two hundred twenty-six thousand, six hundred forty-eight".