55550500005557 has 2 divisors, whose sum is σ = 55550500005558. Its totient is φ = 55550500005556.

The previous prime is 55550500005529. The next prime is 55550500005577. The reversal of 55550500005557 is 75550000505555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31039673398276 + 24510826607281 = 5571326^2 + 4950841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55550500005557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55550500005577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775250002778 + 27775250002779.

It is an arithmetic number, because the mean of its divisors is an integer number (27775250002779).

Almost surely, 2^{55550500005557} is an apocalyptic number.

It is an amenable number.

55550500005557 is a deficient number, since it is larger than the sum of its proper divisors (1).

55550500005557 is an equidigital number, since it uses as much as digits as its factorization.

55550500005557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2734375, while the sum is 47.

The spelling of 55550500005557 in words is "fifty-five trillion, five hundred fifty billion, five hundred million, five thousand, five hundred fifty-seven".