67731826513 has 8 divisors (see below), whose sum is σ = 77232671208. Its totient is φ = 58843939584.

The previous prime is 67731826511. The next prime is 67731826517. The reversal of 67731826513 is 31562813776.

67731826513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 17427168144 + 50304658369 = 132012^2 + 224287^2 .

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 67731826513 - 2¹ = 67731826511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67731826511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153239206 + ... + 153239647.

It is an arithmetic number, because the mean of its divisors is an integer number (9654083901).

Almost surely, 2^67731826513 is an apocalyptic number.

It is an amenable number.

67731826513 is a deficient number, since it is larger than the sum of its proper divisors (9500844695).

67731826513 is a wasteful number, since it uses less digits than its factorization.

67731826513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306478883.

The product of its digits is 1270080, while the sum is 49.

The spelling of 67731826513 in words is "sixty-seven billion, seven hundred thirty-one million, eight hundred twenty-six thousand, five hundred thirteen".