16405435552 has 36 divisors (see below), whose sum is σ = 35501337018. Its totient is φ = 7457014400.

The previous prime is 16405435531. The next prime is 16405435589. The reversal of 16405435552 is 25553450461.

It can be written as a sum of positive squares in only one way, i.e., 16292990736 + 112444816 = 127644^2 + 10604^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2114599 + ... + 2122342.

Almost surely, 2^16405435552 is an apocalyptic number.

It is an amenable number.

16405435552 is an abundant number, since it is smaller than the sum of its proper divisors (19095901466).

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

16405435552 is a wasteful number, since it uses less digits than its factorization.

16405435552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4236973 (or 4236954 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 16405435552 in words is "sixteen billion, four hundred five million, four hundred thirty-five thousand, five hundred fifty-two".