55479720237811 has 2 divisors, whose sum is σ = 55479720237812. Its totient is φ = 55479720237810.

The previous prime is 55479720237731. The next prime is 55479720237827. The reversal of 55479720237811 is 11873202797455.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55479720237811 - 2¹⁵ = 55479720205043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55479720237811.

It is not a weakly prime, because it can be changed into another prime (55479720207811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27739860118905 + 27739860118906.

It is an arithmetic number, because the mean of its divisors is an integer number (27739860118906).

Almost surely, 2^{55479720237811} is an apocalyptic number.

55479720237811 is a deficient number, since it is larger than the sum of its proper divisors (1).

55479720237811 is an equidigital number, since it uses as much as digits as its factorization.

55479720237811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29635200, while the sum is 61.

The spelling of 55479720237811 in words is "fifty-five trillion, four hundred seventy-nine billion, seven hundred twenty million, two hundred thirty-seven thousand, eight hundred eleven".