55785747 has 8 divisors (see below), whose sum is σ = 74607040. Its totient is φ = 37077480.

The previous prime is 55785731. The next prime is 55785773. The reversal of 55785747 is 74758755.

It is a happy number.

55785747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55785747 - 2⁴ = 55785731 is a prime.

It is a super-2 number, since 2×55785747² = 6224099136696018, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55785696 and 55785705.

It is not an unprimeable number, because it can be changed into a prime (55785547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27097 + ... + 29082.

It is an arithmetic number, because the mean of its divisors is an integer number (9325880).

Almost surely, 2^55785747 is an apocalyptic number.

55785747 is a deficient number, since it is larger than the sum of its proper divisors (18821293).

55785747 is a wasteful number, since it uses less digits than its factorization.

55785747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56513.

The product of its digits is 1372000, while the sum is 48.

The square root of 55785747 is about 7468.9856741060. The cubic root of 55785747 is about 382.0976948305.

It can be divided in two parts, 5578 and 5747, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 55785747 in words is "fifty-five million, seven hundred eighty-five thousand, seven hundred forty-seven".