6745531540 has 96 divisors (see below), whose sum is σ = 16430190336. Its totient is φ = 2301911040.

The previous prime is 6745531523. The next prime is 6745531543. The reversal of 6745531540 is 451355476.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6745531493 and 6745531502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6745531543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255604 + ... + 280756.

It is an arithmetic number, because the mean of its divisors is an integer number (171147816).

Almost surely, 2^6745531540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6745531540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8215095168).

6745531540 is an abundant number, since it is smaller than the sum of its proper divisors (9684658796).

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

6745531540 is a wasteful number, since it uses less digits than its factorization.

6745531540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25249 (or 25247 counting only the distinct ones).

The product of its (nonzero) digits is 252000, while the sum is 40.

The square root of 6745531540 is about 82131.1849421400. The cubic root of 6745531540 is about 1889.4644526502.

The spelling of 6745531540 in words is "six billion, seven hundred forty-five million, five hundred thirty-one thousand, five hundred forty".