6256509985 has 32 divisors (see below), whose sum is σ = 8356400640. Its totient is φ = 4458854400.

The previous prime is 6256509977. The next prime is 6256510009. The reversal of 6256509985 is 5899056526.

It is not a de Polignac number, because 6256509985 - 2³ = 6256509977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 547480 + ... + 558790.

It is an arithmetic number, because the mean of its divisors is an integer number (261137520).

Almost surely, 2^6256509985 is an apocalyptic number.

It is an amenable number.

6256509985 is a deficient number, since it is larger than the sum of its proper divisors (2099890655).

6256509985 is a wasteful number, since it uses less digits than its factorization.

6256509985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11529.

The product of its (nonzero) digits is 5832000, while the sum is 55.

The square root of 6256509985 is about 79098.1035486945. The cubic root of 6256509985 is about 1842.6550737932.

The spelling of 6256509985 in words is "six billion, two hundred fifty-six million, five hundred nine thousand, nine hundred eighty-five".