55710755021 has 2 divisors, whose sum is σ = 55710755022. Its totient is φ = 55710755020.

The previous prime is 55710755017. The next prime is 55710755027. The reversal of 55710755021 is 12055701755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44293832521 + 11416922500 = 210461^2 + 106850^2 .

It is a cyclic number.

It is not a de Polignac number, because 55710755021 - 2² = 55710755017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55710755027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27855377510 + 27855377511.

It is an arithmetic number, because the mean of its divisors is an integer number (27855377511).

Almost surely, 2^55710755021 is an apocalyptic number.

It is an amenable number.

55710755021 is a deficient number, since it is larger than the sum of its proper divisors (1).

55710755021 is an equidigital number, since it uses as much as digits as its factorization.

55710755021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61250, while the sum is 38.

The spelling of 55710755021 in words is "fifty-five billion, seven hundred ten million, seven hundred fifty-five thousand, twenty-one".