55020982617781 has 2 divisors, whose sum is σ = 55020982617782. Its totient is φ = 55020982617780.

The previous prime is 55020982617737. The next prime is 55020982617851. The reversal of 55020982617781 is 18771628902055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31338063037681 + 23682919580100 = 5598041^2 + 4866510^2 .

It is a cyclic number.

It is not a de Polignac number, because 55020982617781 - 2¹³ = 55020982609589 is a prime.

It is a super-2 number, since 2×55020982617781² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55020982618781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27510491308890 + 27510491308891.

It is an arithmetic number, because the mean of its divisors is an integer number (27510491308891).

Almost surely, 2^{55020982617781} is an apocalyptic number.

It is an amenable number.

55020982617781 is a deficient number, since it is larger than the sum of its proper divisors (1).

55020982617781 is an equidigital number, since it uses as much as digits as its factorization.

55020982617781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16934400, while the sum is 61.

The spelling of 55020982617781 in words is "fifty-five trillion, twenty billion, nine hundred eighty-two million, six hundred seventeen thousand, seven hundred eighty-one".