161253630 has 96 divisors (see below), whose sum is σ = 447932160. Its totient is φ = 40158720.

The previous prime is 161253629. The next prime is 161253641. The reversal of 161253630 is 36352161.

161253630 is a `hidden beast` number, since 1 + 6 + 1 + 25 + 3 + 630 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 161253594 and 161253603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79914 + ... + 81906.

It is an arithmetic number, because the mean of its divisors is an integer number (4665960).

Almost surely, 2^161253630 is an apocalyptic number.

161253630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161253630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223966080).

161253630 is an abundant number, since it is smaller than the sum of its proper divisors (286678530).

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

161253630 is a wasteful number, since it uses less digits than its factorization.

161253630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2066 (or 2063 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 161253630 is about 12698.5680295063. The cubic root of 161253630 is about 544.2977010076.

The spelling of 161253630 in words is "one hundred sixty-one million, two hundred fifty-three thousand, six hundred thirty".