55520388667 has 2 divisors, whose sum is σ = 55520388668. Its totient is φ = 55520388666.

The previous prime is 55520388653. The next prime is 55520388751. The reversal of 55520388667 is 76688302555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55520388667 - 2²³ = 55512000059 is a prime.

It is not a weakly prime, because it can be changed into another prime (55520388067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27760194333 + 27760194334.

It is an arithmetic number, because the mean of its divisors is an integer number (27760194334).

Almost surely, 2^55520388667 is an apocalyptic number.

55520388667 is a deficient number, since it is larger than the sum of its proper divisors (1).

55520388667 is an equidigital number, since it uses as much as digits as its factorization.

55520388667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096000, while the sum is 55.

The spelling of 55520388667 in words is "fifty-five billion, five hundred twenty million, three hundred eighty-eight thousand, six hundred sixty-seven".