16540553407540 has 48 divisors (see below), whose sum is σ = 36285173890560. Its totient is φ = 6321612577280.

The previous prime is 16540553407447. The next prime is 16540553407549. The reversal of 16540553407540 is 4570435504561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16540553407549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19316245 + ... + 20154364.

It is an arithmetic number, because the mean of its divisors is an integer number (755941122720).

Almost surely, 2^{16540553407540} is an apocalyptic number.

16540553407540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16540553407540 is an abundant number, since it is smaller than the sum of its proper divisors (19744620483020).

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

16540553407540 is a wasteful number, since it uses less digits than its factorization.

16540553407540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39471552 (or 39471550 counting only the distinct ones).

The product of its (nonzero) digits is 5040000, while the sum is 49.

The spelling of 16540553407540 in words is "sixteen trillion, five hundred forty billion, five hundred fifty-three million, four hundred seven thousand, five hundred forty".