55752603678721 has 4 divisors (see below), whose sum is σ = 56264095455700. Its totient is φ = 55241111901744.

The previous prime is 55752603678659. The next prime is 55752603678767. The reversal of 55752603678721 is 12787630625755.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24377918760000 + 31374684918721 = 4937400^2 + 5601311^2 .

It is a cyclic number.

It is not a de Polignac number, because 55752603678721 - 2¹⁵ = 55752603645953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55752603678791) 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 3 ways as a sum of consecutive naturals, for example, 255745888326 + ... + 255745888543.

It is an arithmetic number, because the mean of its divisors is an integer number (14066023863925).

Almost surely, 2^{55752603678721} is an apocalyptic number.

It is an amenable number.

55752603678721 is a deficient number, since it is larger than the sum of its proper divisors (511491776979).

55752603678721 is a wasteful number, since it uses less digits than its factorization.

55752603678721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511491776978.

The product of its (nonzero) digits is 148176000, while the sum is 64.

The spelling of 55752603678721 in words is "fifty-five trillion, seven hundred fifty-two billion, six hundred three million, six hundred seventy-eight thousand, seven hundred twenty-one".