55561005011 has 2 divisors, whose sum is σ = 55561005012. Its totient is φ = 55561005010.

The previous prime is 55561005007. The next prime is 55561005023. The reversal of 55561005011 is 11050016555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55561005011 - 2² = 55561005007 is a prime.

It is a super-2 number, since 2×55561005011² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (55561005001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27780502505 + 27780502506.

It is an arithmetic number, because the mean of its divisors is an integer number (27780502506).

Almost surely, 2^55561005011 is an apocalyptic number.

55561005011 is a deficient number, since it is larger than the sum of its proper divisors (1).

55561005011 is an equidigital number, since it uses as much as digits as its factorization.

55561005011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 55561005011 in words is "fifty-five billion, five hundred sixty-one million, five thousand, eleven".