16405706447 has 16 divisors (see below), whose sum is σ = 18258659328. Its totient is φ = 14638307040.

The previous prime is 16405706423. The next prime is 16405706453. The reversal of 16405706447 is 74460750461.

It is a cyclic number.

It is not a de Polignac number, because 16405706447 - 2¹² = 16405702351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16405706398 and 16405706407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16405706407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 332798 + ... + 378900.

It is an arithmetic number, because the mean of its divisors is an integer number (1141166208).

Almost surely, 2^16405706447 is an apocalyptic number.

16405706447 is a deficient number, since it is larger than the sum of its proper divisors (1852952881).

16405706447 is a wasteful number, since it uses less digits than its factorization.

16405706447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47030.

The product of its (nonzero) digits is 564480, while the sum is 44.

The spelling of 16405706447 in words is "sixteen billion, four hundred five million, seven hundred six thousand, four hundred forty-seven".