55505055550550 has 12 divisors (see below), whose sum is σ = 103239403324116. Its totient is φ = 22202022220200.

The previous prime is 55505055550517. The next prime is 55505055550579. The reversal of 55505055550550 is 5505555050555.

It is a super-2 number, since 2×55505055550550² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50), and also a Moran number because the ratio is a prime number: 1110101111011 = 55505055550550 / (5 + 5 + 5 + 0 + 5 + 0 + 5 + 5 + 5 + 5 + 0 + 5 + 5 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 555050555456 + ... + 555050555555.

It is an arithmetic number, because the mean of its divisors is an integer number (8603283610343).

Almost surely, 2^{55505055550550} is an apocalyptic number.

55505055550550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55505055550550 is a deficient number, since it is larger than the sum of its proper divisors (47734347773566).

55505055550550 is a wasteful number, since it uses less digits than its factorization.

55505055550550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110101111023 (or 1110101111018 counting only the distinct ones).

The product of its (nonzero) digits is 9765625, while the sum is 50.

The spelling of 55505055550550 in words is "fifty-five trillion, five hundred five billion, fifty-five million, five hundred fifty thousand, five hundred fifty".