55442333993 has 2 divisors, whose sum is σ = 55442333994. Its totient is φ = 55442333992.

The previous prime is 55442333959. The next prime is 55442334007. The reversal of 55442333993 is 39933324455.

55442333993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54283408144 + 1158925849 = 232988^2 + 34043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55442333993 is a prime.

It is not a weakly prime, because it can be changed into another prime (55442333693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27721166996 + 27721166997.

It is an arithmetic number, because the mean of its divisors is an integer number (27721166997).

Almost surely, 2^55442333993 is an apocalyptic number.

It is an amenable number.

55442333993 is a deficient number, since it is larger than the sum of its proper divisors (1).

55442333993 is an equidigital number, since it uses as much as digits as its factorization.

55442333993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5248800, while the sum is 50.

The spelling of 55442333993 in words is "fifty-five billion, four hundred forty-two million, three hundred thirty-three thousand, nine hundred ninety-three".