55084878252721 has 2 divisors, whose sum is σ = 55084878252722. Its totient is φ = 55084878252720.

The previous prime is 55084878252671. The next prime is 55084878252739. The reversal of 55084878252721 is 12725287848055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54074903502096 + 1009974750625 = 7353564^2 + 1004975^2 .

It is a cyclic number.

It is not a de Polignac number, because 55084878252721 - 2²⁹ = 55084341381809 is a prime.

It is not a weakly prime, because it can be changed into another prime (55084878252791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27542439126360 + 27542439126361.

It is an arithmetic number, because the mean of its divisors is an integer number (27542439126361).

Almost surely, 2^{55084878252721} is an apocalyptic number.

It is an amenable number.

55084878252721 is a deficient number, since it is larger than the sum of its proper divisors (1).

55084878252721 is an equidigital number, since it uses as much as digits as its factorization.

55084878252721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100352000, while the sum is 64.

The spelling of 55084878252721 in words is "fifty-five trillion, eighty-four billion, eight hundred seventy-eight million, two hundred fifty-two thousand, seven hundred twenty-one".