5551685505 has 12 divisors (see below), whose sum is σ = 9622921620. Its totient is φ = 2960898912.

The previous prime is 5551685471. The next prime is 5551685539. The reversal of 5551685505 is 5055861555.

5551685505 is a `hidden beast` number, since 5 + 5 + 516 + 85 + 50 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (5551685471) and next prime (5551685539).

It can be written as a sum of positive squares in 2 ways, for example, as 1252522881 + 4299162624 = 35391^2 + 65568^2 .

It is not a de Polignac number, because 5551685505 - 2¹⁷ = 5551554433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 123370789 = 5551685505 / (5 + 5 + 5 + 1 + 6 + 8 + 5 + 5 + 0 + 5).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61685350 + ... + 61685439.

It is an arithmetic number, because the mean of its divisors is an integer number (801910135).

Almost surely, 2^5551685505 is an apocalyptic number.

It is an amenable number.

5551685505 is a deficient number, since it is larger than the sum of its proper divisors (4071236115).

5551685505 is a wasteful number, since it uses less digits than its factorization.

5551685505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123370800 (or 123370797 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 45.

The square root of 5551685505 is about 74509.6336388792. The cubic root of 5551685505 is about 1770.6862655343.

The spelling of 5551685505 in words is "five billion, five hundred fifty-one million, six hundred eighty-five thousand, five hundred five".