16505043534 has 24 divisors (see below), whose sum is σ = 40869631920. Its totient is φ = 4715726688.

The previous prime is 16505043493. The next prime is 16505043553. The reversal of 16505043534 is 43534050561.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65496079 + ... + 65496330.

It is an arithmetic number, because the mean of its divisors is an integer number (1702901330).

Almost surely, 2^16505043534 is an apocalyptic number.

16505043534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16505043534 is an abundant number, since it is smaller than the sum of its proper divisors (24364588386).

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

16505043534 is a wasteful number, since it uses less digits than its factorization.

16505043534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130992424 (or 130992421 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The spelling of 16505043534 in words is "sixteen billion, five hundred five million, forty-three thousand, five hundred thirty-four".