68561520413 has 8 divisors (see below), whose sum is σ = 69437846400. Its totient is φ = 67685406048.

The previous prime is 68561520403. The next prime is 68561520449. The reversal of 68561520413 is 31402516586.

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

It is a cyclic number.

It is not a de Polignac number, because 68561520413 - 2²⁶ = 68494411549 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 (68561520403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 660170 + ... + 756932.

It is an arithmetic number, because the mean of its divisors is an integer number (8679730800).

Almost surely, 2^68561520413 is an apocalyptic number.

It is an amenable number.

68561520413 is a deficient number, since it is larger than the sum of its proper divisors (876325987).

68561520413 is an equidigital number, since it uses as much as digits as its factorization.

68561520413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105811.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 68561520413 in words is "sixty-eight billion, five hundred sixty-one million, five hundred twenty thousand, four hundred thirteen".