16239399345 has 256 divisors, whose sum is σ = 34639073280. Its totient is φ = 7142473728.

The previous prime is 16239399331. The next prime is 16239399349. The reversal of 16239399345 is 54399393261.

16239399345 is a `hidden beast` number, since 1 + 623 + 9 + 3 + 9 + 9 + 3 + 4 + 5 = 666.

It is not a de Polignac number, because 16239399345 - 2⁷ = 16239399217 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16239399291 and 16239399300.

It is not an unprimeable number, because it can be changed into a prime (16239399349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 51882909 + ... + 51883221.

It is an arithmetic number, because the mean of its divisors is an integer number (135308880).

Almost surely, 2^16239399345 is an apocalyptic number.

16239399345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16239399345 is an abundant number, since it is smaller than the sum of its proper divisors (18399673935).

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

16239399345 is a wasteful number, since it uses less digits than its factorization.

16239399345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441 (or 435 counting only the distinct ones).

The product of its digits is 4723920, while the sum is 54.

It can be divided in two parts, 1623939 and 9345, that added together give a square (1633284 = 1278²).

The spelling of 16239399345 in words is "sixteen billion, two hundred thirty-nine million, three hundred ninety-nine thousand, three hundred forty-five".