16405632768 has 108 divisors (see below), whose sum is σ = 50791662600. Its totient is φ = 4687312896.

The previous prime is 16405632767. The next prime is 16405632823. The reversal of 16405632768 is 86723650461.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16405632767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180343 + ... + 255606.

Almost surely, 2^16405632768 is an apocalyptic number.

It is an amenable number.

16405632768 is an abundant number, since it is smaller than the sum of its proper divisors (34386029832).

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

16405632768 is an equidigital number, since it uses as much as digits as its factorization.

16405632768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435982 (or 435961 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 16405632768 in words is "sixteen billion, four hundred five million, six hundred thirty-two thousand, seven hundred sixty-eight".