16540351443 has 32 divisors (see below), whose sum is σ = 30550725120. Its totient is φ = 8592389280.

The previous prime is 16540351411. The next prime is 16540351481. The reversal of 16540351443 is 34415304561.

16540351443 is a `hidden beast` number, since 1 + 65 + 40 + 3 + 514 + 43 = 666.

It is not a de Polignac number, because 16540351443 - 2⁵ = 16540351411 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16540351398 and 16540351407.

It is not an unprimeable number, because it can be changed into a prime (16540351543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3975880 + ... + 3980037.

It is an arithmetic number, because the mean of its divisors is an integer number (954710160).

Almost surely, 2^16540351443 is an apocalyptic number.

16540351443 is a deficient number, since it is larger than the sum of its proper divisors (14010373677).

16540351443 is a wasteful number, since it uses less digits than its factorization.

16540351443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955944 (or 7955938 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 16540351443 in words is "sixteen billion, five hundred forty million, three hundred fifty-one thousand, four hundred forty-three".