55284343991 has 2 divisors, whose sum is σ = 55284343992. Its totient is φ = 55284343990.

The previous prime is 55284343979. The next prime is 55284343997. The reversal of 55284343991 is 19934348255.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55284343991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55284343997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27642171995 + 27642171996.

It is an arithmetic number, because the mean of its divisors is an integer number (27642171996).

Almost surely, 2^55284343991 is an apocalyptic number.

55284343991 is a deficient number, since it is larger than the sum of its proper divisors (1).

55284343991 is an equidigital number, since it uses as much as digits as its factorization.

55284343991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 53.

The spelling of 55284343991 in words is "fifty-five billion, two hundred eighty-four million, three hundred forty-three thousand, nine hundred ninety-one".