55000278001 has 2 divisors, whose sum is σ = 55000278002. Its totient is φ = 55000278000.

The previous prime is 55000277989. The next prime is 55000278023. The reversal of 55000278001 is 10087200055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44611776225 + 10388501776 = 211215^2 + 101924^2 .

It is a cyclic number.

It is not a de Polignac number, because 55000278001 - 2⁹ = 55000277489 is a prime.

It is not a weakly prime, because it can be changed into another prime (55000278031) 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, 27500139000 + 27500139001.

It is an arithmetic number, because the mean of its divisors is an integer number (27500139001).

Almost surely, 2^55000278001 is an apocalyptic number.

It is an amenable number.

55000278001 is a deficient number, since it is larger than the sum of its proper divisors (1).

55000278001 is an equidigital number, since it uses as much as digits as its factorization.

55000278001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 28.

Adding to 55000278001 its reverse (10087200055), we get a palindrome (65087478056).

The spelling of 55000278001 in words is "fifty-five billion, two hundred seventy-eight thousand, one".