16405379240 has 16 divisors (see below), whose sum is σ = 36912103380. Its totient is φ = 6562151680.

The previous prime is 16405379227. The next prime is 16405379297. The reversal of 16405379240 is 4297350461.

16405379240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15372528196 + 1032851044 = 123986^2 + 32138^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205067201 + ... + 205067280.

Almost surely, 2^16405379240 is an apocalyptic number.

16405379240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16405379240 is an abundant number, since it is smaller than the sum of its proper divisors (20506724140).

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

16405379240 is a wasteful number, since it uses less digits than its factorization.

16405379240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410134492 (or 410134488 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 16405379240 in words is "sixteen billion, four hundred five million, three hundred seventy-nine thousand, two hundred forty".