67534326391 has 6 divisors (see below), whose sum is σ = 78560338920. Its totient is φ = 57886565436.

The previous prime is 67534326359. The next prime is 67534326401. The reversal of 67534326391 is 19362343576.

It is not a de Polignac number, because 67534326391 - 2⁵ = 67534326359 is a prime.

It is a super-2 number, since 2×67534326391² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49), and also a Moran number because the ratio is a prime number: 1378251559 = 67534326391 / (6 + 7 + 5 + 3 + 4 + 3 + 2 + 6 + 3 + 9 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67534327391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 689125731 + ... + 689125828.

It is an arithmetic number, because the mean of its divisors is an integer number (13093389820).

Almost surely, 2^67534326391 is an apocalyptic number.

67534326391 is a deficient number, since it is larger than the sum of its proper divisors (11026012529).

67534326391 is a wasteful number, since it uses less digits than its factorization.

67534326391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378251573 (or 1378251566 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 49.

The spelling of 67534326391 in words is "sixty-seven billion, five hundred thirty-four million, three hundred twenty-six thousand, three hundred ninety-one".