68556576413 has 32 divisors (see below), whose sum is σ = 79126873056. Its totient is φ = 58836123648.

The previous prime is 68556576409. The next prime is 68556576427. The reversal of 68556576413 is 31467565586.

It can be written as a sum of positive squares in 16 ways, for example, as 1053781444 + 67502794969 = 32462^2 + 259813^2 .

It is a cyclic number.

It is not a de Polignac number, because 68556576413 - 2² = 68556576409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68556576493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12709445 + ... + 12714837.

It is an arithmetic number, because the mean of its divisors is an integer number (2472714783).

Almost surely, 2^68556576413 is an apocalyptic number.

It is an amenable number.

68556576413 is a deficient number, since it is larger than the sum of its proper divisors (10570296643).

68556576413 is a wasteful number, since it uses less digits than its factorization.

68556576413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6113.

The product of its digits is 18144000, while the sum is 56.

The spelling of 68556576413 in words is "sixty-eight billion, five hundred fifty-six million, five hundred seventy-six thousand, four hundred thirteen".