6544457855 has 16 divisors (see below), whose sum is σ = 8459579520. Its totient is φ = 4831615488.

The previous prime is 6544457849. The next prime is 6544457923. The reversal of 6544457855 is 5587544456.

It is a cyclic number.

It is not a de Polignac number, because 6544457855 - 2⁶ = 6544457791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6544457797 and 6544457806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311111 + ... + 331479.

It is an arithmetic number, because the mean of its divisors is an integer number (528723720).

Almost surely, 2^6544457855 is an apocalyptic number.

6544457855 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6544457855 is a deficient number, since it is larger than the sum of its proper divisors (1915121665).

6544457855 is a wasteful number, since it uses less digits than its factorization.

6544457855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25330.

The product of its digits is 13440000, while the sum is 53.

The square root of 6544457855 is about 80897.8235492155. The cubic root of 6544457855 is about 1870.5007719257.

The spelling of 6544457855 in words is "six billion, five hundred forty-four million, four hundred fifty-seven thousand, eight hundred fifty-five".