16521877436 has 24 divisors (see below), whose sum is σ = 29739825696. Its totient is φ = 8025462720.

The previous prime is 16521877433. The next prime is 16521877447. The reversal of 16521877436 is 63477812561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16521877433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13385 + ... + 182271.

It is an arithmetic number, because the mean of its divisors is an integer number (1239159404).

Almost surely, 2^16521877436 is an apocalyptic number.

It is an amenable number.

16521877436 is a deficient number, since it is larger than the sum of its proper divisors (13217948260).

16521877436 is a wasteful number, since it uses less digits than its factorization.

16521877436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169589 (or 169587 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 50.

The spelling of 16521877436 in words is "sixteen billion, five hundred twenty-one million, eight hundred seventy-seven thousand, four hundred thirty-six".