54555632981 has 2 divisors, whose sum is σ = 54555632982. Its totient is φ = 54555632980.

The previous prime is 54555632939. The next prime is 54555633001. The reversal of 54555632981 is 18923655545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52045121956 + 2510511025 = 228134^2 + 50105^2 .

It is a cyclic number.

It is not a de Polignac number, because 54555632981 - 2¹⁴ = 54555616597 is a prime.

It is a super-2 number, since 2×54555632981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54555632921) 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 as a sum of consecutive naturals, namely, 27277816490 + 27277816491.

It is an arithmetic number, because the mean of its divisors is an integer number (27277816491).

Almost surely, 2^54555632981 is an apocalyptic number.

It is an amenable number.

54555632981 is a deficient number, since it is larger than the sum of its proper divisors (1).

54555632981 is an equidigital number, since it uses as much as digits as its factorization.

54555632981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480000, while the sum is 53.

The spelling of 54555632981 in words is "fifty-four billion, five hundred fifty-five million, six hundred thirty-two thousand, nine hundred eighty-one".