7745047540 has 24 divisors (see below), whose sum is σ = 16348880520. Its totient is φ = 3081965568.

The previous prime is 7745047523. The next prime is 7745047571. The reversal of 7745047540 is 457405477.

It can be written as a sum of positive squares in 4 ways, for example, as 1584995344 + 6160052196 = 39812^2 + 78486^2 .

It is a super-3 number, since 3×7745047540³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 7 ways as a sum of consecutive naturals, for example, 999385 + ... + 1007104.

It is an arithmetic number, because the mean of its divisors is an integer number (681203355).

Almost surely, 2^7745047540 is an apocalyptic number.

It is an amenable number.

7745047540 is an abundant number, since it is smaller than the sum of its proper divisors (8603832980).

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

7745047540 is a wasteful number, since it uses less digits than its factorization.

7745047540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006691 (or 2006689 counting only the distinct ones).

The product of its (nonzero) digits is 548800, while the sum is 43.

The square root of 7745047540 is about 88005.9517305506. The cubic root of 7745047540 is about 1978.5241816871.

The spelling of 7745047540 in words is "seven billion, seven hundred forty-five million, forty-seven thousand, five hundred forty".