55345520987 has 2 divisors, whose sum is σ = 55345520988. Its totient is φ = 55345520986.

The previous prime is 55345520981. The next prime is 55345521001. The reversal of 55345520987 is 78902554355.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55345520987 - 2⁸ = 55345520731 is a prime.

It is not a weakly prime, because it can be changed into another prime (55345520981) 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, 27672760493 + 27672760494.

It is an arithmetic number, because the mean of its divisors is an integer number (27672760494).

Almost surely, 2^55345520987 is an apocalyptic number.

55345520987 is a deficient number, since it is larger than the sum of its proper divisors (1).

55345520987 is an equidigital number, since it uses as much as digits as its factorization.

55345520987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560000, while the sum is 53.

The spelling of 55345520987 in words is "fifty-five billion, three hundred forty-five million, five hundred twenty thousand, nine hundred eighty-seven".