6545605440 has 112 divisors (see below), whose sum is σ = 22671633600. Its totient is φ = 1586810880.

The previous prime is 6545605439. The next prime is 6545605441. The reversal of 6545605440 is 445065456.

It is an interprime number because it is at equal distance from previous prime (6545605439) and next prime (6545605441).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6545605441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299365 + ... + 320484.

It is an arithmetic number, because the mean of its divisors is an integer number (202425300).

Almost surely, 2^6545605440 is an apocalyptic number.

6545605440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6545605440 is an abundant number, since it is smaller than the sum of its proper divisors (16126028160).

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

6545605440 is a wasteful number, since it uses less digits than its factorization.

6545605440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619880 (or 619870 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The square root of 6545605440 is about 80904.9160434643. The cubic root of 6545605440 is about 1870.6100976697.

The spelling of 6545605440 in words is "six billion, five hundred forty-five million, six hundred five thousand, four hundred forty".