67578717413 has 4 divisors (see below), whose sum is σ = 67670164320. Its totient is φ = 67487270508.

The previous prime is 67578717389. The next prime is 67578717443. The reversal of 67578717413 is 31471787576.

67578717413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67578717413 - 2²² = 67574523109 is a prime.

It is a super-2 number, since 2×67578717413² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67578717443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45722345 + ... + 45723822.

It is an arithmetic number, because the mean of its divisors is an integer number (16917541080).

Almost surely, 2^67578717413 is an apocalyptic number.

It is an amenable number.

67578717413 is a deficient number, since it is larger than the sum of its proper divisors (91446907).

67578717413 is an equidigital number, since it uses as much as digits as its factorization.

67578717413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91446906.

The product of its digits is 6914880, while the sum is 56.

The spelling of 67578717413 in words is "sixty-seven billion, five hundred seventy-eight million, seven hundred seventeen thousand, four hundred thirteen".