16208732540 has 576 divisors, whose sum is σ = 49583923200. Its totient is φ = 4402944000.

The previous prime is 16208732539. The next prime is 16208732563. The reversal of 16208732540 is 4523780261.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16208732494 and 16208732503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 395334920 + ... + 395334960.

It is an arithmetic number, because the mean of its divisors is an integer number (86083200).

Almost surely, 2^16208732540 is an apocalyptic number.

16208732540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16208732540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24791961600).

16208732540 is an abundant number, since it is smaller than the sum of its proper divisors (33375190660).

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

16208732540 is a wasteful number, since it uses less digits than its factorization.

16208732540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 16208732540 in words is "sixteen billion, two hundred eight million, seven hundred thirty-two thousand, five hundred forty".