55630551285 has 12 divisors (see below), whose sum is σ = 96426288972. Its totient is φ = 29669627328.

The previous prime is 55630551271. The next prime is 55630551343. The reversal of 55630551285 is 58215503655.

It is a happy number.

55630551285 is a `hidden beast` number, since 5 + 5 + 630 + 5 + 5 + 1 + 2 + 8 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27283441329 + 28347109956 = 165177^2 + 168366^2 .

It is not a de Polignac number, because 55630551285 - 2⁵ = 55630551253 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: 1236234473 = 55630551285 / (5 + 5 + 6 + 3 + 0 + 5 + 5 + 1 + 2 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 55630551285.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 618117192 + ... + 618117281.

It is an arithmetic number, because the mean of its divisors is an integer number (8035524081).

Almost surely, 2^55630551285 is an apocalyptic number.

It is an amenable number.

55630551285 is a deficient number, since it is larger than the sum of its proper divisors (40795737687).

55630551285 is a wasteful number, since it uses less digits than its factorization.

55630551285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236234484 (or 1236234481 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 45.

The spelling of 55630551285 in words is "fifty-five billion, six hundred thirty million, five hundred fifty-one thousand, two hundred eighty-five".