6556293985 has 16 divisors (see below), whose sum is σ = 7896341376. Its totient is φ = 5225882368.

The previous prime is 6556293983. The next prime is 6556294007. The reversal of 6556293985 is 5893926556.

6556293985 = T₆₆₁₁₁ + T₆₆₁₁₂ + T₆₆₁₁₃.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6556293985 - 2¹ = 6556293983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6556293983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1738572 + ... + 1742338.

It is an arithmetic number, because the mean of its divisors is an integer number (493521336).

Almost surely, 2^6556293985 is an apocalyptic number.

6556293985 is the 66113-rd centered triangular number.

It is an amenable number.

6556293985 is a deficient number, since it is larger than the sum of its proper divisors (1340047391).

6556293985 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (6556293984) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (4952).

6556293985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4952.

The product of its digits is 17496000, while the sum is 58.

The square root of 6556293985 is about 80970.9453137358. The cubic root of 6556293985 is about 1871.6277385502.

The spelling of 6556293985 in words is "six billion, five hundred fifty-six million, two hundred ninety-three thousand, nine hundred eighty-five".