6540557364 has 72 divisors (see below), whose sum is σ = 18051310368. Its totient is φ = 1980313920.

The previous prime is 6540557347. The next prime is 6540557393. The reversal of 6540557364 is 4637550456.

6540557364 is a `hidden beast` number, since 65 + 4 + 0 + 557 + 36 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 511254 + ... + 523890.

It is an arithmetic number, because the mean of its divisors is an integer number (250712644).

Almost surely, 2^6540557364 is an apocalyptic number.

It is an amenable number.

6540557364 is an abundant number, since it is smaller than the sum of its proper divisors (11510753004).

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

6540557364 is a wasteful number, since it uses less digits than its factorization.

6540557364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13965 (or 13960 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 45.

The square root of 6540557364 is about 80873.7124410646. The cubic root of 6540557364 is about 1870.1290924827.

The spelling of 6540557364 in words is "six billion, five hundred forty million, five hundred fifty-seven thousand, three hundred sixty-four".