55785611506 has 8 divisors (see below), whose sum is σ = 83792578284. Its totient is φ = 27854752080.

The previous prime is 55785611477. The next prime is 55785611543. The reversal of 55785611506 is 60511658755.

It can be written as a sum of positive squares in 2 ways, for example, as 55293171025 + 492440481 = 235145^2 + 22191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×55785611506² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55785611506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19025005 + ... + 19027936.

Almost surely, 2^55785611506 is an apocalyptic number.

55785611506 is a deficient number, since it is larger than the sum of its proper divisors (28006966778).

55785611506 is a wasteful number, since it uses less digits than its factorization.

55785611506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38053676.

The product of its (nonzero) digits is 1260000, while the sum is 49.

The spelling of 55785611506 in words is "fifty-five billion, seven hundred eighty-five million, six hundred eleven thousand, five hundred six".