161630784 has 84 divisors (see below), whose sum is σ = 529482304. Its totient is φ = 46179072.

The previous prime is 161630779. The next prime is 161630789. The reversal of 161630784 is 487036161.

161630784 is a `hidden beast` number, since 1 + 616 + 30 + 7 + 8 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (161630779) and next prime (161630789).

It is a tau number, because it is divible by the number of its divisors (84).

It is a super-2 number, since 2×161630784² = 52249020672909312, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (161630789) 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, 16012 + ... + 24075.

Almost surely, 2^161630784 is an apocalyptic number.

161630784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161630784 is an abundant number, since it is smaller than the sum of its proper divisors (367851520).

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

161630784 is a wasteful number, since it uses less digits than its factorization.

161630784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40112 (or 40099 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 161630784 is about 12713.4096134751. The cubic root of 161630784 is about 544.7217208521.

It can be divided in two parts, 1616 and 30784, that added together give a square (32400 = 180²).

The spelling of 161630784 in words is "one hundred sixty-one million, six hundred thirty thousand, seven hundred eighty-four".