6853745977156 has 81 divisors (see below), whose sum is σ = 13798894685751. Its totient is φ = 2976690173184.

The previous prime is 6853745977153. The next prime is 6853745977181. The reversal of 6853745977156 is 6517795473586.

The square root of 6853745977156 is 2617966.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 61884522756 + 6791861454400 = 248766^2 + 2606120^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6853745977153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1157138011 + ... + 1157143933.

Almost surely, 2^{6853745977156} is an apocalyptic number.

6853745977156 is the 2617966-th square number.

It is an amenable number.

6853745977156 is an abundant number, since it is smaller than the sum of its proper divisors (6945148708595).

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

6853745977156 is an equidigital number, since it uses as much as digits as its factorization.

6853745977156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11910 (or 5955 counting only the distinct ones).

The product of its digits is 1333584000, while the sum is 73.

The spelling of 6853745977156 in words is "six trillion, eight hundred fifty-three billion, seven hundred forty-five million, nine hundred seventy-seven thousand, one hundred fifty-six".