55216565983 has 2 divisors, whose sum is σ = 55216565984. Its totient is φ = 55216565982.

The previous prime is 55216565927. The next prime is 55216566029. The reversal of 55216565983 is 38956561255.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55216565983 - 2²¹ = 55214468831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55216565483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27608282991 + 27608282992.

It is an arithmetic number, because the mean of its divisors is an integer number (27608282992).

Almost surely, 2^55216565983 is an apocalyptic number.

55216565983 is a deficient number, since it is larger than the sum of its proper divisors (1).

55216565983 is an equidigital number, since it uses as much as digits as its factorization.

55216565983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720000, while the sum is 55.

The spelling of 55216565983 in words is "fifty-five billion, two hundred sixteen million, five hundred sixty-five thousand, nine hundred eighty-three".