16540500000 has 168 divisors, whose sum is σ = 54277742736. Its totient is φ = 4410400000.

The previous prime is 16540499993. The next prime is 16540500023. The reversal of 16540500000 is 504561.

It is a happy number.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16540500000.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1494487 + ... + 1505513.

It is an arithmetic number, because the mean of its divisors is an integer number (323081802).

Almost surely, 2^16540500000 is an apocalyptic number.

16540500000 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 16540500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27138871368).

16540500000 is an abundant number, since it is smaller than the sum of its proper divisors (37737242736).

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

16540500000 is an frugal number, since it uses more digits than its factorization.

16540500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11070 (or 11037 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The spelling of 16540500000 in words is "sixteen billion, five hundred forty million, five hundred thousand".