53517756266721 has 12 divisors (see below), whose sum is σ = 79101179805648. Its totient is φ = 34848771522264.

The previous prime is 53517756266713. The next prime is 53517756266729. The reversal of 53517756266721 is 12766265771535.

53517756266721 is a `hidden beast` number, since 5 + 3 + 5 + 1 + 7 + 7 + 562 + 6 + 67 + 2 + 1 = 666.

53517756266721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (53517756266713) and next prime (53517756266729).

It is not a de Polignac number, because 53517756266721 - 2³ = 53517756266713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53517756266729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69144387555 + ... + 69144388328.

It is an arithmetic number, because the mean of its divisors is an integer number (6591764983804).

Almost surely, 2^{53517756266721} is an apocalyptic number.

It is an amenable number.

53517756266721 is a deficient number, since it is larger than the sum of its proper divisors (25583423538927).

53517756266721 is a wasteful number, since it uses less digits than its factorization.

53517756266721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138288775932 (or 138288775929 counting only the distinct ones).

The product of its digits is 111132000, while the sum is 63.

The spelling of 53517756266721 in words is "fifty-three trillion, five hundred seventeen billion, seven hundred fifty-six million, two hundred sixty-six thousand, seven hundred twenty-one".