16540261650 has 144 divisors (see below), whose sum is σ = 50150093760. Its totient is φ = 3871459200.

The previous prime is 16540261579. The next prime is 16540261651. The reversal of 16540261650 is 5616204561.

16540261650 is a `hidden beast` number, since 1 + 6 + 540 + 2 + 61 + 6 + 50 = 666.

16540261650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16540261651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 85939 + ... + 201161.

It is an arithmetic number, because the mean of its divisors is an integer number (348264540).

Almost surely, 2^16540261650 is an apocalyptic number.

16540261650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16540261650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25075046880).

16540261650 is an abundant number, since it is smaller than the sum of its proper divisors (33609832110).

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

16540261650 is a wasteful number, since it uses less digits than its factorization.

16540261650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115281 (or 115273 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 16540261650 in words is "sixteen billion, five hundred forty million, two hundred sixty-one thousand, six hundred fifty".