16381243530 has 48 divisors (see below), whose sum is σ = 43012952424. Its totient is φ = 4325078400.

The previous prime is 16381243513. The next prime is 16381243531. The reversal of 16381243530 is 3534218361.

16381243530 is a `hidden beast` number, since 1 + 6 + 3 + 81 + 2 + 43 + 530 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 12283067241 + 4098176289 = 110829^2 + 64017^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16381243531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 891969 + ... + 910148.

Almost surely, 2^16381243530 is an apocalyptic number.

16381243530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16381243530 is an abundant number, since it is smaller than the sum of its proper divisors (26631708894).

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

16381243530 is a wasteful number, since it uses less digits than its factorization.

16381243530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802231 (or 1802228 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 16381243530 in words is "sixteen billion, three hundred eighty-one million, two hundred forty-three thousand, five hundred thirty".