6881438737540 has 24 divisors (see below), whose sum is σ = 14452605058752. Its totient is φ = 2752273836000.

The previous prime is 6881438737531. The next prime is 6881438737543. The reversal of 6881438737540 is 457378341886.

It is a super-2 number, since 2×6881438737540² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6881438737543) by changing a digit.

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, 18666586 + ... + 19031665.

It is an arithmetic number, because the mean of its divisors is an integer number (602191877448).

Almost surely, 2^{6881438737540} is an apocalyptic number.

It is an amenable number.

6881438737540 is an abundant number, since it is smaller than the sum of its proper divisors (7571166321212).

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

6881438737540 is a wasteful number, since it uses less digits than its factorization.

6881438737540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37707387 (or 37707385 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 64.

The spelling of 6881438737540 in words is "six trillion, eight hundred eighty-one billion, four hundred thirty-eight million, seven hundred thirty-seven thousand, five hundred forty".