16006721500 has 96 divisors (see below), whose sum is σ = 43584952320. Its totient is φ = 4989096000.

The previous prime is 16006721483. The next prime is 16006721519. The reversal of 16006721500 is 512760061.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 169380 + ... + 246379.

It is an arithmetic number, because the mean of its divisors is an integer number (454009920).

Almost surely, 2^16006721500 is an apocalyptic number.

16006721500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16006721500 is an abundant number, since it is smaller than the sum of its proper divisors (27578230820).

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

16006721500 is a wasteful number, since it uses less digits than its factorization.

16006721500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415796 (or 415784 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The spelling of 16006721500 in words is "sixteen billion, six million, seven hundred twenty-one thousand, five hundred".