16549870520 has 32 divisors (see below), whose sum is σ = 37868353200. Its totient is φ = 6507744768.

The previous prime is 16549870517. The next prime is 16549870529. The reversal of 16549870520 is 2507894561.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16549870529) 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, 3503969 + ... + 3508688.

Almost surely, 2^16549870520 is an apocalyptic number.

16549870520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16549870520 is an abundant number, since it is smaller than the sum of its proper divisors (21318482680).

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

16549870520 is a wasteful number, since it uses less digits than its factorization.

16549870520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7012727 (or 7012723 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 16549870520 in words is "sixteen billion, five hundred forty-nine million, eight hundred seventy thousand, five hundred twenty".