16721527660 has 24 divisors (see below), whose sum is σ = 36064269360. Its totient is φ = 6507837504.

The previous prime is 16721527633. The next prime is 16721527663. The reversal of 16721527660 is 6672512761.

It is not an unprimeable number, because it can be changed into a prime (16721527663) 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, 11297590 + ... + 11299069.

It is an arithmetic number, because the mean of its divisors is an integer number (1502677890).

Almost surely, 2^16721527660 is an apocalyptic number.

16721527660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16721527660 is an abundant number, since it is smaller than the sum of its proper divisors (19342741700).

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

16721527660 is a wasteful number, since it uses less digits than its factorization.

16721527660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22596705 (or 22596703 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The spelling of 16721527660 in words is "sixteen billion, seven hundred twenty-one million, five hundred twenty-seven thousand, six hundred sixty".