16405706452 has 12 divisors (see below), whose sum is σ = 30398809140. Its totient is φ = 7720332416.

The previous prime is 16405706423. The next prime is 16405706453. The reversal of 16405706452 is 25460750461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13141412496 + 3264293956 = 114636^2 + 57134^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16405706453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120630127 + ... + 120630262.

It is an arithmetic number, because the mean of its divisors is an integer number (2533234095).

Almost surely, 2^16405706452 is an apocalyptic number.

It is an amenable number.

16405706452 is a deficient number, since it is larger than the sum of its proper divisors (13993102688).

16405706452 is a wasteful number, since it uses less digits than its factorization.

16405706452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241260410 (or 241260408 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 16405706452 in words is "sixteen billion, four hundred five million, seven hundred six thousand, four hundred fifty-two".