6745549920 has 96 divisors (see below), whose sum is σ = 21822823008. Its totient is φ = 1750192128.

The previous prime is 6745549919. The next prime is 6745549939. The reversal of 6745549920 is 299455476.

It is a tau number, because it is divible by the number of its divisors (96).

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, 172149 + ... + 207668.

It is an arithmetic number, because the mean of its divisors is an integer number (227321073).

Almost surely, 2^6745549920 is an apocalyptic number.

6745549920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6745549920 is an abundant number, since it is smaller than the sum of its proper divisors (15077273088).

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

6745549920 is a wasteful number, since it uses less digits than its factorization.

6745549920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379872 (or 379864 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 51.

The square root of 6745549920 is about 82131.2968362244. The cubic root of 6745549920 is about 1889.4661687653.

The spelling of 6745549920 in words is "six billion, seven hundred forty-five million, five hundred forty-nine thousand, nine hundred twenty".