7685861256 has 40 divisors (see below), whose sum is σ = 21527529870. Its totient is φ = 2561953536.

The previous prime is 7685861243. The next prime is 7685861273. The reversal of 7685861256 is 6521685867.

7685861256 is a `hidden beast` number, since 7 + 6 + 8 + 586 + 1 + 2 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7574220900 + 111640356 = 87030^2 + 10566^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5929801 + ... + 5931096.

Almost surely, 2^7685861256 is an apocalyptic number.

It is an amenable number.

7685861256 is an abundant number, since it is smaller than the sum of its proper divisors (13841668614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7685861256 is a wasteful number, since it uses less digits than its factorization.

7685861256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11860915 (or 11860902 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 7685861256 is about 87669.0438866536. The cubic root of 7685861256 is about 1973.4714450399.

The spelling of 7685861256 in words is "seven billion, six hundred eighty-five million, eight hundred sixty-one thousand, two hundred fifty-six".